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

scripts/xsparse.c

@@ -1,23 +1,24 @@
 /* xsparse - expands compressed sparse file images extracted from GNU tar
    archives.
 
-   Copyright (C) 2006, 2007, 2010 Free Software Foundation, Inc.
+   Copyright 2006, 2007, 2010, 2013 Free Software Foundation, Inc.
 
-   Written by Sergey Poznyakoff
+   This file is part of GNU tar.
 
-   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 the
-   Free Software Foundation; either version 3, or (at your option) any later
-   version.
+   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.
 
-   This program 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.
+   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, write to the Free Software Foundation, Inc.,
-   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+   Written by Sergey Poznyakoff  */
 
 #include <stdlib.h>
 #include <stdint.h>