Copyright for gdmap source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: gdmap
Source: http://gdmap.sourceforge.net

Files: *
Copyright: 2005-2008 Markus Lausser 
License: GPL-2+

Files: debian/*
Copyright: 2006-2009 Mario Iseli 
           2011-2013, 2017 Stephen Kitt 
License: GPL-2+

License: GPL-2+
 This package 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 2 of the License, or (at
 your option) any later version.
 .
 This package 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 package; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301
 USA
 .
 On Debian systems, the complete text of the GNU General Public
 License version 2 can be found in
 `/usr/share/common-licenses/GPL-2'.