Copyright for radicale source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Radicale
Upstream-Contact: https://github.com/Kozea/Radicale/issues
Source: https://radicale.org/download
 https://github.com/Kozea/Radicale/releases
 git://github.com/Kozea/Radicale

Files: *
Copyright: 2008, Nicolas Kandel
  2008, Pascal Halter
  2008-2017, Guillaume Ayoub 
  2012-2016, Jean-Marc Martins 
  2017, Unrud 
License-Grant:
 This library 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.
License: GPL-3+

Files: debian/*
Copyright: 2010-2019, Jonas Smedegaard 
License-Grant:
 This library 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.
License: GPL-3+

License: GPL-3+
License-Reference: /usr/share/common-licenses/GPL-3