Copyright for postgresql-common source package in Lunar

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Contact: Debian PostgreSQL Maintainers 

Files: *
Copyright: 2005-2014 Martin Pitt 
           2009 Cyril Bouthors 
           2010 Dimitri Fontaine 
           2011-2020 Christoph Berg 
           2013 Peter Eisentraut 
License: GPL-2+
 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 2 of the License, or
 (at your option) any later version.
 .
 The full text of the GPL is distributed as in
 /usr/share/common-licenses/GPL-2 on Debian systems.