Copyright for munin source package in Experimental

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Source: https://github.com/munin-monitoring/munin
Upstream-Name: Munin
Upstream-Contact: irc://irc.oftc.net/#munin

Files: *
License: GPL-2
Copyright: 2004-2010 Lupe Christoph 
           2004-2011 Jimmy Olsen 
           2006-2013 Nicolai Langfeldt 
           2007-2014 Matthias Schmitz 
           2007-2017 Stig Sandbeck Mathisen 
           2009-2009 Kjell-Magne Øierud 
           2009-2011 Matthew Boyle 
           2009-2011 Tom Feiner 
           2009-2012 Erik I. Bolsø 
           2010-2018 Steve Schnepp 
           2011-2018 Kenyon Ralph 
           2012-2015 Daniel Black 
           2013-2018 Gabriele Pohl 
           2015-2018 Quentin Stoeckel 
           2016-2018 Lars Kruse 
           ... and many more contributors

Files: debian/*
License: GPL-2
Copyright: 2008-2018 Holger Levsen 
           2009-2017 Stig Sandbeck Mathisen 
           2016-2018 Lars Kruse 

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; version 2 dated June, 1991.
  .
  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.
  .
  A copy of the GNU General Public License is available as
  /usr/share/common-licenses/GPL-2 in the Debian distribution or on the World
  Wide Web at https://www.gnu.org/licenses/.