maint: update copyrights for 2013 and as per current GNU standards

scripts/dump-remind.in

@@ -7,7 +7,23 @@
 # This script should be run by tar with --info-script (-F) to inform
 # interested parties that a tape for the next volume of the backup needs to
 # be put in the tape drive.
-#
+
+# Copyright 2004-2005, 2010, 2012-2013 Free Software Foundation, Inc.
+
+# This file is part of GNU tar.
+
+# GNU tar is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# GNU tar is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 # Include location of 'sendmail' and GNU finger.
 PATH="/usr/lib:/usr/local/gnubin:${PATH}"