update copyright to 2021

129 files changed, 129 insertions, 0 deletions

diff --git a/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.c b/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.c
index 0873f0a..ecdacb8 100644
--- a/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.c
+++ b/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2020 Colomban Wendling <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.h b/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.h
index fc97494..ec0c02b 100644
--- a/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.h
+++ b/plugins/a11y-keyboard/msd-a11y-keyboard-atspi.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2020 Colomban Wendling <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/msd-a11y-keyboard-manager.c b/plugins/a11y-keyboard/msd-a11y-keyboard-manager.c
index fa8d0df..9ccd80a 100644
--- a/plugins/a11y-keyboard/msd-a11y-keyboard-manager.c
+++ b/plugins/a11y-keyboard/msd-a11y-keyboard-manager.c
@@ -2,6 +2,7 @@
  *
  * Copyright © 2001 Ximian, Inc.
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/msd-a11y-keyboard-manager.h b/plugins/a11y-keyboard/msd-a11y-keyboard-manager.h
index b27a00f..050eed6 100644
--- a/plugins/a11y-keyboard/msd-a11y-keyboard-manager.h
+++ b/plugins/a11y-keyboard/msd-a11y-keyboard-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.c b/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.c
index ef84510..5679fa4 100644
--- a/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.c
+++ b/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.h b/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.h
index 7967107..a2dfd7b 100644
--- a/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.h
+++ b/plugins/a11y-keyboard/msd-a11y-keyboard-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/msd-a11y-preferences-dialog.c b/plugins/a11y-keyboard/msd-a11y-preferences-dialog.c
index f0cbb3b..844c070 100644
--- a/plugins/a11y-keyboard/msd-a11y-preferences-dialog.c
+++ b/plugins/a11y-keyboard/msd-a11y-preferences-dialog.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/msd-a11y-preferences-dialog.h b/plugins/a11y-keyboard/msd-a11y-preferences-dialog.h
index 4011497..780dfa1 100644
--- a/plugins/a11y-keyboard/msd-a11y-preferences-dialog.h
+++ b/plugins/a11y-keyboard/msd-a11y-preferences-dialog.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-keyboard/test-a11y-preferences-dialog.c b/plugins/a11y-keyboard/test-a11y-preferences-dialog.c
index 16d3f92..be2de98 100644
--- a/plugins/a11y-keyboard/test-a11y-preferences-dialog.c
+++ b/plugins/a11y-keyboard/test-a11y-preferences-dialog.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
diff --git a/plugins/a11y-settings/msd-a11y-settings-manager.c b/plugins/a11y-settings/msd-a11y-settings-manager.c
index e1c5302..1b88523 100644
--- a/plugins/a11y-settings/msd-a11y-settings-manager.c
+++ b/plugins/a11y-settings/msd-a11y-settings-manager.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-settings/msd-a11y-settings-manager.h b/plugins/a11y-settings/msd-a11y-settings-manager.h
index 9f6e3f7..e5bdf69 100644
--- a/plugins/a11y-settings/msd-a11y-settings-manager.h
+++ b/plugins/a11y-settings/msd-a11y-settings-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-settings/msd-a11y-settings-plugin.c b/plugins/a11y-settings/msd-a11y-settings-plugin.c
index 6759c6f..58588d4 100644
--- a/plugins/a11y-settings/msd-a11y-settings-plugin.c
+++ b/plugins/a11y-settings/msd-a11y-settings-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/a11y-settings/msd-a11y-settings-plugin.h b/plugins/a11y-settings/msd-a11y-settings-plugin.h
index a19c8a4..71ba344 100644
--- a/plugins/a11y-settings/msd-a11y-settings-plugin.h
+++ b/plugins/a11y-settings/msd-a11y-settings-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2011 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/background/msd-background-manager.c b/plugins/background/msd-background-manager.c
index 0ac1615..b6fed5d 100644
--- a/plugins/background/msd-background-manager.c
+++ b/plugins/background/msd-background-manager.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2007 Red Hat, Inc.
  * Copyright (C) 2012 Jasmine Hassan <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/background/msd-background-manager.h b/plugins/background/msd-background-manager.h
index c2fb7d0..8fd4895 100644
--- a/plugins/background/msd-background-manager.h
+++ b/plugins/background/msd-background-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/background/msd-background-plugin.c b/plugins/background/msd-background-plugin.c
index 7957230..55d88f5 100644
--- a/plugins/background/msd-background-plugin.c
+++ b/plugins/background/msd-background-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/background/msd-background-plugin.h b/plugins/background/msd-background-plugin.h
index 460c303..9ea5b1a 100644
--- a/plugins/background/msd-background-plugin.h
+++ b/plugins/background/msd-background-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/background/test-background.c b/plugins/background/test-background.c
index 33d4ea3..a2a5be1 100644
--- a/plugins/background/test-background.c
+++ b/plugins/background/test-background.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/clipboard/list.c b/plugins/clipboard/list.c
index 7f60bb1..bc67053 100644
--- a/plugins/clipboard/list.c
+++ b/plugins/clipboard/list.c
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2004 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/clipboard/list.h b/plugins/clipboard/list.h
index 04cf1e1..babac90 100644
--- a/plugins/clipboard/list.h
+++ b/plugins/clipboard/list.h
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2004 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/clipboard/msd-clipboard-manager.c b/plugins/clipboard/msd-clipboard-manager.c
index d99f04f..67b6f66 100644
--- a/plugins/clipboard/msd-clipboard-manager.c
+++ b/plugins/clipboard/msd-clipboard-manager.c
@@ -4,6 +4,7 @@
  * Copyright (C) 2007 Anders Carlsson
  * Copyright (C) 2007 Rodrigo Moya
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/clipboard/msd-clipboard-manager.h b/plugins/clipboard/msd-clipboard-manager.h
index 5e4465a..04ca380 100644
--- a/plugins/clipboard/msd-clipboard-manager.h
+++ b/plugins/clipboard/msd-clipboard-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/clipboard/msd-clipboard-plugin.c b/plugins/clipboard/msd-clipboard-plugin.c
index 7951c60..5c6fa76 100644
--- a/plugins/clipboard/msd-clipboard-plugin.c
+++ b/plugins/clipboard/msd-clipboard-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/clipboard/msd-clipboard-plugin.h b/plugins/clipboard/msd-clipboard-plugin.h
index 171282d..6953f17 100644
--- a/plugins/clipboard/msd-clipboard-plugin.h
+++ b/plugins/clipboard/msd-clipboard-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/clipboard/xutils.c b/plugins/clipboard/xutils.c
index ef57a85..e799fda 100644
--- a/plugins/clipboard/xutils.c
+++ b/plugins/clipboard/xutils.c
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2004 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/clipboard/xutils.h b/plugins/clipboard/xutils.h
index 12a00e4..197e9dd 100644
--- a/plugins/clipboard/xutils.h
+++ b/plugins/clipboard/xutils.h
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2004 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/common/eggaccelerators.c b/plugins/common/eggaccelerators.c
index 9662a3f..0f924d3 100644
--- a/plugins/common/eggaccelerators.c
+++ b/plugins/common/eggaccelerators.c
@@ -1,5 +1,6 @@
 /* eggaccelerators.c
  * Copyright (C) 2002  Red Hat, Inc.; Copyright 1998, 2001 Tim Janik
+ * Copyright (C) 2012-2021 MATE Developers
  * Developed by Havoc Pennington, Tim Janik
  *
  * This library is free software; you can redistribute it and/or
diff --git a/plugins/common/eggaccelerators.h b/plugins/common/eggaccelerators.h
index 8584373..6e0e431 100644
--- a/plugins/common/eggaccelerators.h
+++ b/plugins/common/eggaccelerators.h
@@ -1,5 +1,6 @@
 /* eggaccelerators.h
  * Copyright (C) 2002  Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  * Developed by Havoc Pennington
  *
  * This library is free software; you can redistribute it and/or
diff --git a/plugins/common/msd-input-helper.c b/plugins/common/msd-input-helper.c
index 641c51c..05fad76 100644
--- a/plugins/common/msd-input-helper.c
+++ b/plugins/common/msd-input-helper.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2010 Bastien Nocera <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/common/msd-input-helper.h b/plugins/common/msd-input-helper.h
index e46c97e..8f722e4 100644
--- a/plugins/common/msd-input-helper.h
+++ b/plugins/common/msd-input-helper.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2010 Bastien Nocera <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/common/msd-keygrab.c b/plugins/common/msd-keygrab.c
index d112ae9..0ea0cc1 100644
--- a/plugins/common/msd-keygrab.c
+++ b/plugins/common/msd-keygrab.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2001-2003 Bastien Nocera <[email protected]>
  * Copyright (C) 2006-2007 William Jon McCann <[email protected]>
  * Copyright (C) 2008 Jens Granseuer <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/common/msd-keygrab.h b/plugins/common/msd-keygrab.h
index ff633d6..f69307f 100644
--- a/plugins/common/msd-keygrab.h
+++ b/plugins/common/msd-keygrab.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Jens Granseuer <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/common/msd-osd-window.c b/plugins/common/msd-osd-window.c
index bc1ffb6..cab027d 100644
--- a/plugins/common/msd-osd-window.c
+++ b/plugins/common/msd-osd-window.c
@@ -4,6 +4,7 @@
  *
  * Copyright (C) 2006-2007 William Jon McCann <[email protected]>
  * Copyright (C) 2009 Novell, Inc
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Authors:
  *   William Jon McCann <[email protected]>
diff --git a/plugins/common/msd-osd-window.h b/plugins/common/msd-osd-window.h
index ac3325a..23651d2 100644
--- a/plugins/common/msd-osd-window.h
+++ b/plugins/common/msd-osd-window.h
@@ -4,6 +4,7 @@
  *
  * Copyright (C) 2006 William Jon McCann <[email protected]>
  * Copyright (C) 2009 Novell, Inc
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Authors:
  *   William Jon McCann <[email protected]>
diff --git a/plugins/datetime/msd-datetime-mechanism-main.c b/plugins/datetime/msd-datetime-mechanism-main.c
index 473c968..3572829 100644
--- a/plugins/datetime/msd-datetime-mechanism-main.c
+++ b/plugins/datetime/msd-datetime-mechanism-main.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 David Zeuthen <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/datetime/msd-datetime-mechanism.c b/plugins/datetime/msd-datetime-mechanism.c
index 4dd569c..0a604f6 100644
--- a/plugins/datetime/msd-datetime-mechanism.c
+++ b/plugins/datetime/msd-datetime-mechanism.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 David Zeuthen <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/datetime/msd-datetime-mechanism.h b/plugins/datetime/msd-datetime-mechanism.h
index cc3ad73..86791f3 100644
--- a/plugins/datetime/msd-datetime-mechanism.h
+++ b/plugins/datetime/msd-datetime-mechanism.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 David Zeuthen <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/datetime/system-timezone.c b/plugins/datetime/system-timezone.c
index f9fab7a..e4ba56f 100644
--- a/plugins/datetime/system-timezone.c
+++ b/plugins/datetime/system-timezone.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2008 Novell, Inc.
  *
  * Authors: Vincent Untz <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/datetime/system-timezone.h b/plugins/datetime/system-timezone.h
index c801348..d98ca5d 100644
--- a/plugins/datetime/system-timezone.h
+++ b/plugins/datetime/system-timezone.h
@@ -3,6 +3,7 @@
  * Copyright (C) 2008 Novell, Inc.
  *
  * Authors: Vincent Untz <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/dummy/msd-dummy-manager.c b/plugins/dummy/msd-dummy-manager.c
index 94855b0..b79b255 100644
--- a/plugins/dummy/msd-dummy-manager.c
+++ b/plugins/dummy/msd-dummy-manager.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/dummy/msd-dummy-manager.h b/plugins/dummy/msd-dummy-manager.h
index bb4d662..18ba679 100644
--- a/plugins/dummy/msd-dummy-manager.h
+++ b/plugins/dummy/msd-dummy-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/dummy/msd-dummy-plugin.c b/plugins/dummy/msd-dummy-plugin.c
index e3a6ca9..a26e252 100644
--- a/plugins/dummy/msd-dummy-plugin.c
+++ b/plugins/dummy/msd-dummy-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/dummy/msd-dummy-plugin.h b/plugins/dummy/msd-dummy-plugin.h
index 1cc3e31..c276876 100644
--- a/plugins/dummy/msd-dummy-plugin.h
+++ b/plugins/dummy/msd-dummy-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/housekeeping/msd-disk-space.c b/plugins/housekeeping/msd-disk-space.c
index 14b67a1..ad1b7a0 100644
--- a/plugins/housekeeping/msd-disk-space.c
+++ b/plugins/housekeeping/msd-disk-space.c
@@ -2,6 +2,7 @@
  * vim: set et sw=8 ts=8:
  *
  * Copyright (c) 2008, Novell, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Authors: Vincent Untz <[email protected]>
  *
diff --git a/plugins/housekeeping/msd-disk-space.h b/plugins/housekeeping/msd-disk-space.h
index 13d4aa4..ff84a41 100644
--- a/plugins/housekeeping/msd-disk-space.h
+++ b/plugins/housekeeping/msd-disk-space.h
@@ -4,6 +4,7 @@
  * Copyright (c) 2008, Novell, Inc.
  *
  * Authors: Vincent Untz <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/housekeeping/msd-housekeeping-manager.c b/plugins/housekeeping/msd-housekeeping-manager.c
index a4596cf..8378243 100644
--- a/plugins/housekeeping/msd-housekeeping-manager.c
+++ b/plugins/housekeeping/msd-housekeeping-manager.c
@@ -1,6 +1,7 @@
 /*
  * Copyright (C) 2008 Michael J. Chudobiak <[email protected]>
  * Copyright (C) 2012 Jasmine Hassan <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/housekeeping/msd-housekeeping-manager.h b/plugins/housekeeping/msd-housekeeping-manager.h
index 5d481cc..40ed061 100644
--- a/plugins/housekeeping/msd-housekeeping-manager.h
+++ b/plugins/housekeeping/msd-housekeeping-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Michael J. Chudobiak <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/housekeeping/msd-housekeeping-plugin.c b/plugins/housekeeping/msd-housekeeping-plugin.c
index 8a829fe..3d2b7ed 100644
--- a/plugins/housekeeping/msd-housekeeping-plugin.c
+++ b/plugins/housekeeping/msd-housekeeping-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Michael J. Chudobiak <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/housekeeping/msd-housekeeping-plugin.h b/plugins/housekeeping/msd-housekeeping-plugin.h
index 15be276..7fb155a 100644
--- a/plugins/housekeeping/msd-housekeeping-plugin.h
+++ b/plugins/housekeeping/msd-housekeeping-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Michael J. Chudobiak <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/housekeeping/msd-ldsm-dialog.c b/plugins/housekeeping/msd-ldsm-dialog.c
index a0e118d..3b06d09 100644
--- a/plugins/housekeeping/msd-ldsm-dialog.c
+++ b/plugins/housekeeping/msd-ldsm-dialog.c
@@ -2,6 +2,7 @@
  *
  * msd-ldsm-dialog.c
  * Copyright (C) Chris Coulson 2009 <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * msd-ldsm-dialog.c is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
diff --git a/plugins/housekeeping/msd-ldsm-dialog.h b/plugins/housekeeping/msd-ldsm-dialog.h
index 8b95fb9..7b59c80 100644
--- a/plugins/housekeeping/msd-ldsm-dialog.h
+++ b/plugins/housekeeping/msd-ldsm-dialog.h
@@ -2,6 +2,7 @@
  *
  * msd-ldsm-dialog.c
  * Copyright (C) Chris Coulson 2009 <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * msd-ldsm-dialog.c is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
diff --git a/plugins/housekeeping/msd-ldsm-trash-empty.c b/plugins/housekeeping/msd-ldsm-trash-empty.c
index 301b6dc..e331dda 100644
--- a/plugins/housekeeping/msd-ldsm-trash-empty.c
+++ b/plugins/housekeeping/msd-ldsm-trash-empty.c
@@ -3,6 +3,7 @@
  * msd-ldsm-trash-empty.c
  * Copyright (C) Chris Coulson 2009 <[email protected]>
  *	     (C) Ryan Lortie 2008
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * msd-ldsm-trash-empty.c is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
diff --git a/plugins/housekeeping/msd-ldsm-trash-empty.h b/plugins/housekeeping/msd-ldsm-trash-empty.h
index 478f0a7..52daa95 100644
--- a/plugins/housekeeping/msd-ldsm-trash-empty.h
+++ b/plugins/housekeeping/msd-ldsm-trash-empty.h
@@ -2,6 +2,7 @@
  *
  * msd-ldsm-trash-empty.h
  * Copyright (C) Chris Coulson 2009 <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * msd-ldsm-trash-empty.h is free software: you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by the
diff --git a/plugins/keybindings/dconf-util.c b/plugins/keybindings/dconf-util.c
index 10dd4e9..d6040fa 100644
--- a/plugins/keybindings/dconf-util.c
+++ b/plugins/keybindings/dconf-util.c
@@ -2,6 +2,7 @@
  * dconf-util.c: helper API for dconf
  *
  * Copyright (C) 2012 Stefano Karapetsas
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
diff --git a/plugins/keybindings/dconf-util.h b/plugins/keybindings/dconf-util.h
index fe782d9..bdf9c00 100644
--- a/plugins/keybindings/dconf-util.h
+++ b/plugins/keybindings/dconf-util.h
@@ -2,6 +2,7 @@
  * dconf-util.h: helper API for dconf
  *
  * Copyright (C) 2012 Stefano Karapetsas
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
diff --git a/plugins/keybindings/msd-keybindings-manager.c b/plugins/keybindings/msd-keybindings-manager.c
index a7ec128..2077ef7 100644
--- a/plugins/keybindings/msd-keybindings-manager.c
+++ b/plugins/keybindings/msd-keybindings-manager.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keybindings/msd-keybindings-manager.h b/plugins/keybindings/msd-keybindings-manager.h
index 95b1bed..00b118c 100644
--- a/plugins/keybindings/msd-keybindings-manager.h
+++ b/plugins/keybindings/msd-keybindings-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keybindings/msd-keybindings-plugin.c b/plugins/keybindings/msd-keybindings-plugin.c
index ddf186a..28fc33f 100644
--- a/plugins/keybindings/msd-keybindings-plugin.c
+++ b/plugins/keybindings/msd-keybindings-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keybindings/msd-keybindings-plugin.h b/plugins/keybindings/msd-keybindings-plugin.h
index f45d0f8..c29f74a 100644
--- a/plugins/keybindings/msd-keybindings-plugin.h
+++ b/plugins/keybindings/msd-keybindings-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keyboard/delayed-dialog.c b/plugins/keyboard/delayed-dialog.c
index c2e469e..0968585 100644
--- a/plugins/keyboard/delayed-dialog.c
+++ b/plugins/keyboard/delayed-dialog.c
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2006 Novell, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
diff --git a/plugins/keyboard/delayed-dialog.h b/plugins/keyboard/delayed-dialog.h
index 367bf18..c1303f4 100644
--- a/plugins/keyboard/delayed-dialog.h
+++ b/plugins/keyboard/delayed-dialog.h
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2006 Novell, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
diff --git a/plugins/keyboard/msd-keyboard-manager.c b/plugins/keyboard/msd-keyboard-manager.c
index 8beadea..b05cddd 100644
--- a/plugins/keyboard/msd-keyboard-manager.c
+++ b/plugins/keyboard/msd-keyboard-manager.c
@@ -2,6 +2,7 @@
  *
  * Copyright © 2001 Ximian, Inc.
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keyboard/msd-keyboard-manager.h b/plugins/keyboard/msd-keyboard-manager.h
index 2986a5b..b6bddf6 100644
--- a/plugins/keyboard/msd-keyboard-manager.h
+++ b/plugins/keyboard/msd-keyboard-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keyboard/msd-keyboard-plugin.c b/plugins/keyboard/msd-keyboard-plugin.c
index ed16759..74d7089 100644
--- a/plugins/keyboard/msd-keyboard-plugin.c
+++ b/plugins/keyboard/msd-keyboard-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keyboard/msd-keyboard-plugin.h b/plugins/keyboard/msd-keyboard-plugin.h
index 39a18d7..8ad16f4 100644
--- a/plugins/keyboard/msd-keyboard-plugin.h
+++ b/plugins/keyboard/msd-keyboard-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keyboard/msd-keyboard-xkb.c b/plugins/keyboard/msd-keyboard-xkb.c
index 33fe4e5..9158fb4 100644
--- a/plugins/keyboard/msd-keyboard-xkb.c
+++ b/plugins/keyboard/msd-keyboard-xkb.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2001 Udaltsoft
  *
  * Written by Sergey V. Oudaltsov <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/keyboard/msd-keyboard-xkb.h b/plugins/keyboard/msd-keyboard-xkb.h
index 469a469..e8aef83 100644
--- a/plugins/keyboard/msd-keyboard-xkb.h
+++ b/plugins/keyboard/msd-keyboard-xkb.h
@@ -4,6 +4,7 @@
  * Copyright (C) 2001 Udaltsoft
  *
  * Written by Sergey V. Oudaltsov <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/media-keys/acme.h b/plugins/media-keys/acme.h
index 412ad59..0c25907 100644
--- a/plugins/media-keys/acme.h
+++ b/plugins/media-keys/acme.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2001 Bastien Nocera <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/media-keys/msd-media-keys-manager.c b/plugins/media-keys/msd-media-keys-manager.c
index 750acf5..4abb4af 100644
--- a/plugins/media-keys/msd-media-keys-manager.c
+++ b/plugins/media-keys/msd-media-keys-manager.c
@@ -3,6 +3,7 @@
  * Copyright (C) 2001-2003 Bastien Nocera <[email protected]>
  * Copyright (C) 2006-2007 William Jon McCann <[email protected]>
  * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/media-keys/msd-media-keys-manager.h b/plugins/media-keys/msd-media-keys-manager.h
index 2afb5bc..35d7233 100644
--- a/plugins/media-keys/msd-media-keys-manager.h
+++ b/plugins/media-keys/msd-media-keys-manager.h
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/media-keys/msd-media-keys-plugin.c b/plugins/media-keys/msd-media-keys-plugin.c
index d1124c6..c3a2d98 100644
--- a/plugins/media-keys/msd-media-keys-plugin.c
+++ b/plugins/media-keys/msd-media-keys-plugin.c
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/media-keys/msd-media-keys-plugin.h b/plugins/media-keys/msd-media-keys-plugin.h
index 0662009..be459b0 100644
--- a/plugins/media-keys/msd-media-keys-plugin.h
+++ b/plugins/media-keys/msd-media-keys-plugin.h
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/media-keys/msd-media-keys-window.c b/plugins/media-keys/msd-media-keys-window.c
index 4fb821a..c632b92 100644
--- a/plugins/media-keys/msd-media-keys-window.c
+++ b/plugins/media-keys/msd-media-keys-window.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2006-2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  *
  * This program is free software; you can redistribute it and/or
diff --git a/plugins/media-keys/msd-media-keys-window.h b/plugins/media-keys/msd-media-keys-window.h
index d911e41..92c511e 100644
--- a/plugins/media-keys/msd-media-keys-window.h
+++ b/plugins/media-keys/msd-media-keys-window.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 8; tab-width: 8 -*-
  *
  * Copyright (C) 2006 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
diff --git a/plugins/media-keys/test-media-keys.c b/plugins/media-keys/test-media-keys.c
index 51ea1e3..e9f2ed7 100644
--- a/plugins/media-keys/test-media-keys.c
+++ b/plugins/media-keys/test-media-keys.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
diff --git a/plugins/media-keys/test-media-window.c b/plugins/media-keys/test-media-window.c
index 583ecbf..f6f5c35 100644
--- a/plugins/media-keys/test-media-window.c
+++ b/plugins/media-keys/test-media-window.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
diff --git a/plugins/mouse/msd-locate-pointer.c b/plugins/mouse/msd-locate-pointer.c
index 060e675..c19cdda 100644
--- a/plugins/mouse/msd-locate-pointer.c
+++ b/plugins/mouse/msd-locate-pointer.c
@@ -1,6 +1,7 @@
 /* msd-locate-pointer.c
  *
  * Copyright (C) 2008 Carlos Garnacho  <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by
diff --git a/plugins/mouse/msd-locate-pointer.h b/plugins/mouse/msd-locate-pointer.h
index 4e3a8b3..ba4d724 100644
--- a/plugins/mouse/msd-locate-pointer.h
+++ b/plugins/mouse/msd-locate-pointer.h
@@ -1,5 +1,6 @@
 /*
  * Copyright � 2001 Jonathan Blandford <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/mouse/msd-mouse-manager.c b/plugins/mouse/msd-mouse-manager.c
index 9d1d7c4..75f20b5 100644
--- a/plugins/mouse/msd-mouse-manager.c
+++ b/plugins/mouse/msd-mouse-manager.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/mouse/msd-mouse-manager.h b/plugins/mouse/msd-mouse-manager.h
index a6b66c0..3ba203a 100644
--- a/plugins/mouse/msd-mouse-manager.h
+++ b/plugins/mouse/msd-mouse-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/mouse/msd-mouse-plugin.c b/plugins/mouse/msd-mouse-plugin.c
index 730b8ce..e510771 100644
--- a/plugins/mouse/msd-mouse-plugin.c
+++ b/plugins/mouse/msd-mouse-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/mouse/msd-mouse-plugin.h b/plugins/mouse/msd-mouse-plugin.h
index f9eb865..2809c62 100644
--- a/plugins/mouse/msd-mouse-plugin.h
+++ b/plugins/mouse/msd-mouse-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/mouse/msd-timeline.c b/plugins/mouse/msd-timeline.c
index 042cd5b..85f8079 100644
--- a/plugins/mouse/msd-timeline.c
+++ b/plugins/mouse/msd-timeline.c
@@ -1,6 +1,7 @@
 /* msd-timeline.c
  *
  * Copyright (C) 2008 Carlos Garnacho  <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by
diff --git a/plugins/mouse/msd-timeline.h b/plugins/mouse/msd-timeline.h
index f0ed24a..35082ab 100644
--- a/plugins/mouse/msd-timeline.h
+++ b/plugins/mouse/msd-timeline.h
@@ -1,6 +1,7 @@
 /* msdtimeline.c
  *
  * Copyright (C) 2008 Carlos Garnacho  <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published by
diff --git a/plugins/mpris/bus-watch-namespace.c b/plugins/mpris/bus-watch-namespace.c
index f1aff23..489c96d 100644
--- a/plugins/mpris/bus-watch-namespace.c
+++ b/plugins/mpris/bus-watch-namespace.c
@@ -1,5 +1,6 @@
 /*
  * Copyright 2013 Canonical Ltd.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as
diff --git a/plugins/mpris/bus-watch-namespace.h b/plugins/mpris/bus-watch-namespace.h
index 215f6be..20c5628 100644
--- a/plugins/mpris/bus-watch-namespace.h
+++ b/plugins/mpris/bus-watch-namespace.h
@@ -1,5 +1,6 @@
 /*
  * Copyright 2013 Canonical Ltd.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU Lesser General Public License as
diff --git a/plugins/mpris/msd-mpris-manager.c b/plugins/mpris/msd-mpris-manager.c
index f9686f1..5ec761a 100644
--- a/plugins/mpris/msd-mpris-manager.c
+++ b/plugins/mpris/msd-mpris-manager.c
@@ -4,6 +4,7 @@
  *               2013 Steve Zesch <[email protected]>
  *               2007 William Jon McCann <[email protected]>
  *               2007 Jan Arne Petersen <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/mpris/msd-mpris-manager.h b/plugins/mpris/msd-mpris-manager.h
index a5671ec..d43f15e 100644
--- a/plugins/mpris/msd-mpris-manager.h
+++ b/plugins/mpris/msd-mpris-manager.h
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2013 Stefano Karapetsas <[email protected]>
  *               2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/mpris/msd-mpris-plugin.c b/plugins/mpris/msd-mpris-plugin.c
index 44923ca..fafd3c4 100644
--- a/plugins/mpris/msd-mpris-plugin.c
+++ b/plugins/mpris/msd-mpris-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/mpris/msd-mpris-plugin.h b/plugins/mpris/msd-mpris-plugin.h
index cf9cf52..087824f 100644
--- a/plugins/mpris/msd-mpris-plugin.h
+++ b/plugins/mpris/msd-mpris-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/rfkill/msd-rfkill-manager.c b/plugins/rfkill/msd-rfkill-manager.c
index 7a79511..b2d3631 100644
--- a/plugins/rfkill/msd-rfkill-manager.c
+++ b/plugins/rfkill/msd-rfkill-manager.c
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2010,2011 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Author: Bastien Nocera <[email protected]>
  *
diff --git a/plugins/rfkill/msd-rfkill-manager.h b/plugins/rfkill/msd-rfkill-manager.h
index 6ca862f..24dfbf2 100644
--- a/plugins/rfkill/msd-rfkill-manager.h
+++ b/plugins/rfkill/msd-rfkill-manager.h
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2010 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/rfkill/msd-rfkill-plugin.c b/plugins/rfkill/msd-rfkill-plugin.c
index a508ca4..5b9f889 100644
--- a/plugins/rfkill/msd-rfkill-plugin.c
+++ b/plugins/rfkill/msd-rfkill-plugin.c
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2010 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/rfkill/msd-rfkill-plugin.h b/plugins/rfkill/msd-rfkill-plugin.h
index 1887d62..d293d74 100644
--- a/plugins/rfkill/msd-rfkill-plugin.h
+++ b/plugins/rfkill/msd-rfkill-plugin.h
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2014 Michal Ratajsky <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/rfkill/rfkill-glib.c b/plugins/rfkill/rfkill-glib.c
index f4d0dd6..37e43d2 100644
--- a/plugins/rfkill/rfkill-glib.c
+++ b/plugins/rfkill/rfkill-glib.c
@@ -4,6 +4,7 @@
  *
  *  Copyright (C) 2012  Bastien Nocera <[email protected]>
  *  Copyright © 2017 Endless Mobile, Inc.
+ *  Copyright (C) 2012-2021 MATE Developers
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
diff --git a/plugins/rfkill/rfkill-glib.h b/plugins/rfkill/rfkill-glib.h
index 4734154..e7dc7a7 100644
--- a/plugins/rfkill/rfkill-glib.h
+++ b/plugins/rfkill/rfkill-glib.h
@@ -3,6 +3,7 @@
  *  gnome-bluetooth - Bluetooth integration for GNOME
  *
  *  Copyright (C) 2012  Bastien Nocera <[email protected]>
+ *  Copyright (C) 2012-2021 MATE Developers
  *
  *
  *  This program is free software; you can redistribute it and/or modify
diff --git a/plugins/rfkill/rfkill.h b/plugins/rfkill/rfkill.h
index abb2c66..dbb2527 100644
--- a/plugins/rfkill/rfkill.h
+++ b/plugins/rfkill/rfkill.h
@@ -5,6 +5,7 @@
  * Copyright (C) 2006 - 2007 Ivo van Doorn
  * Copyright (C) 2007 Dmitry Torokhov
  * Copyright 2009 Johannes Berg <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
diff --git a/plugins/smartcard/msd-smartcard-manager.c b/plugins/smartcard/msd-smartcard-manager.c
index 43d6644..6fbcbbd 100644
--- a/plugins/smartcard/msd-smartcard-manager.c
+++ b/plugins/smartcard/msd-smartcard-manager.c
@@ -2,6 +2,7 @@
  *                           removal events
  *
  * Copyright (C) 2006, 2009 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/smartcard/msd-smartcard-manager.h b/plugins/smartcard/msd-smartcard-manager.h
index c5c9d55..b8b0e7c 100644
--- a/plugins/smartcard/msd-smartcard-manager.h
+++ b/plugins/smartcard/msd-smartcard-manager.h
@@ -2,6 +2,7 @@
  *                           removal events
  *
  * Copyright (C) 2006, 2009 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/smartcard/msd-smartcard-plugin.c b/plugins/smartcard/msd-smartcard-plugin.c
index b11deda..768a7e4 100644
--- a/plugins/smartcard/msd-smartcard-plugin.c
+++ b/plugins/smartcard/msd-smartcard-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2010 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/smartcard/msd-smartcard-plugin.h b/plugins/smartcard/msd-smartcard-plugin.h
index 64663d3..f16665b 100644
--- a/plugins/smartcard/msd-smartcard-plugin.h
+++ b/plugins/smartcard/msd-smartcard-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2010 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/smartcard/msd-smartcard.c b/plugins/smartcard/msd-smartcard.c
index ab46ca6..b5df5ce 100644
--- a/plugins/smartcard/msd-smartcard.c
+++ b/plugins/smartcard/msd-smartcard.c
@@ -1,6 +1,7 @@
 /* msd-smartcard.c - smartcard object
  *
  * Copyright (C) 2006 Ray Strode <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/smartcard/msd-smartcard.h b/plugins/smartcard/msd-smartcard.h
index da50b62..2633e31 100644
--- a/plugins/smartcard/msd-smartcard.h
+++ b/plugins/smartcard/msd-smartcard.h
@@ -1,6 +1,7 @@
 /* securitycard.h - api for reading and writing data to a security card
  *
  * Copyright (C) 2006 Ray Strode
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/sound/msd-sound-manager.c b/plugins/sound/msd-sound-manager.c
index 4a496b4..0b4fbdc 100644
--- a/plugins/sound/msd-sound-manager.c
+++ b/plugins/sound/msd-sound-manager.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Lennart Poettering <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/sound/msd-sound-manager.h b/plugins/sound/msd-sound-manager.h
index 22dd525..a047343 100644
--- a/plugins/sound/msd-sound-manager.h
+++ b/plugins/sound/msd-sound-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Lennart Poettering <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/sound/msd-sound-plugin.c b/plugins/sound/msd-sound-plugin.c
index 998c6ca..2c1411a 100644
--- a/plugins/sound/msd-sound-plugin.c
+++ b/plugins/sound/msd-sound-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Lennart Poettering <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/sound/msd-sound-plugin.h b/plugins/sound/msd-sound-plugin.h
index e201fbb..b65e446 100644
--- a/plugins/sound/msd-sound-plugin.h
+++ b/plugins/sound/msd-sound-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Lennart Poettering <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/typing-break/msd-typing-break-manager.c b/plugins/typing-break/msd-typing-break-manager.c
index eb9946f..8663b24 100644
--- a/plugins/typing-break/msd-typing-break-manager.c
+++ b/plugins/typing-break/msd-typing-break-manager.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/typing-break/msd-typing-break-manager.h b/plugins/typing-break/msd-typing-break-manager.h
index b69b6e2..bf7aaf0 100644
--- a/plugins/typing-break/msd-typing-break-manager.h
+++ b/plugins/typing-break/msd-typing-break-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/typing-break/msd-typing-break-plugin.c b/plugins/typing-break/msd-typing-break-plugin.c
index c47a111..5b9233c 100644
--- a/plugins/typing-break/msd-typing-break-plugin.c
+++ b/plugins/typing-break/msd-typing-break-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/typing-break/msd-typing-break-plugin.h b/plugins/typing-break/msd-typing-break-plugin.h
index 33cd5e2..198d18d 100644
--- a/plugins/typing-break/msd-typing-break-plugin.h
+++ b/plugins/typing-break/msd-typing-break-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrandr/msd-xrandr-manager.c b/plugins/xrandr/msd-xrandr-manager.c
index 96e9455..f920d20 100644
--- a/plugins/xrandr/msd-xrandr-manager.c
+++ b/plugins/xrandr/msd-xrandr-manager.c
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
  * Copyright (C) 2007, 2008 Red Hat, Inc
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrandr/msd-xrandr-manager.h b/plugins/xrandr/msd-xrandr-manager.h
index 8d8f12f..2496d8e 100644
--- a/plugins/xrandr/msd-xrandr-manager.h
+++ b/plugins/xrandr/msd-xrandr-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrandr/msd-xrandr-plugin.c b/plugins/xrandr/msd-xrandr-plugin.c
index 0175138..79ae93d 100644
--- a/plugins/xrandr/msd-xrandr-plugin.c
+++ b/plugins/xrandr/msd-xrandr-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrandr/msd-xrandr-plugin.h b/plugins/xrandr/msd-xrandr-plugin.h
index 9a80ead..60eb7cf 100644
--- a/plugins/xrandr/msd-xrandr-plugin.h
+++ b/plugins/xrandr/msd-xrandr-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrdb/msd-xrdb-manager.c b/plugins/xrdb/msd-xrdb-manager.c
index f440992..f932d49 100644
--- a/plugins/xrdb/msd-xrdb-manager.c
+++ b/plugins/xrdb/msd-xrdb-manager.c
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2003 Ross Burton <[email protected]>
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrdb/msd-xrdb-manager.h b/plugins/xrdb/msd-xrdb-manager.h
index 02e6dbf..1272b35 100644
--- a/plugins/xrdb/msd-xrdb-manager.h
+++ b/plugins/xrdb/msd-xrdb-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrdb/msd-xrdb-plugin.c b/plugins/xrdb/msd-xrdb-plugin.c
index 69a3660..ffb7148 100644
--- a/plugins/xrdb/msd-xrdb-plugin.c
+++ b/plugins/xrdb/msd-xrdb-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xrdb/msd-xrdb-plugin.h b/plugins/xrdb/msd-xrdb-plugin.h
index d21621a..631adc1 100644
--- a/plugins/xrdb/msd-xrdb-plugin.h
+++ b/plugins/xrdb/msd-xrdb-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xsettings/fontconfig-monitor.c b/plugins/xsettings/fontconfig-monitor.c
index ed4a5a9..9669521 100644
--- a/plugins/xsettings/fontconfig-monitor.c
+++ b/plugins/xsettings/fontconfig-monitor.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xsettings/fontconfig-monitor.h b/plugins/xsettings/fontconfig-monitor.h
index 22163e6..9afe3d3 100644
--- a/plugins/xsettings/fontconfig-monitor.h
+++ b/plugins/xsettings/fontconfig-monitor.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2008 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xsettings/msd-xsettings-manager.c b/plugins/xsettings/msd-xsettings-manager.c
index 861aa6a..ec7d079 100644
--- a/plugins/xsettings/msd-xsettings-manager.c
+++ b/plugins/xsettings/msd-xsettings-manager.c
@@ -2,6 +2,7 @@
  *
  * Copyright (C) 2007 Rodrigo Moya
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xsettings/msd-xsettings-manager.h b/plugins/xsettings/msd-xsettings-manager.h
index 86eb32c..908982a 100644
--- a/plugins/xsettings/msd-xsettings-manager.h
+++ b/plugins/xsettings/msd-xsettings-manager.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xsettings/msd-xsettings-plugin.c b/plugins/xsettings/msd-xsettings-plugin.c
index f8fede1..3a636dd 100644
--- a/plugins/xsettings/msd-xsettings-plugin.c
+++ b/plugins/xsettings/msd-xsettings-plugin.c
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xsettings/msd-xsettings-plugin.h b/plugins/xsettings/msd-xsettings-plugin.h
index 37d4e15..76df96a 100644
--- a/plugins/xsettings/msd-xsettings-plugin.h
+++ b/plugins/xsettings/msd-xsettings-plugin.h
@@ -1,6 +1,7 @@
 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
  *
  * Copyright (C) 2007 William Jon McCann <[email protected]>
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
diff --git a/plugins/xsettings/xsettings-common.c b/plugins/xsettings/xsettings-common.c
index 8e3e04c..8e1b7e6 100644
--- a/plugins/xsettings/xsettings-common.c
+++ b/plugins/xsettings/xsettings-common.c
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2001 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/xsettings/xsettings-common.h b/plugins/xsettings/xsettings-common.h
index caf0e59..2165b04 100644
--- a/plugins/xsettings/xsettings-common.h
+++ b/plugins/xsettings/xsettings-common.h
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2001 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/xsettings/xsettings-manager.c b/plugins/xsettings/xsettings-manager.c
index 3d933d5..1d83be3 100644
--- a/plugins/xsettings/xsettings-manager.c
+++ b/plugins/xsettings/xsettings-manager.c
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2001 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that
diff --git a/plugins/xsettings/xsettings-manager.h b/plugins/xsettings/xsettings-manager.h
index 40681ae..aff0209 100644
--- a/plugins/xsettings/xsettings-manager.h
+++ b/plugins/xsettings/xsettings-manager.h
@@ -1,5 +1,6 @@
 /*
  * Copyright © 2001 Red Hat, Inc.
+ * Copyright (C) 2012-2021 MATE Developers
  *
  * Permission to use, copy, modify, distribute, and sell this software and its
  * documentation for any purpose is hereby granted without fee, provided that