Copyright for dfcgen-gtk source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: DFCGen (GTK+)
Upstream-Contact: Ralf Hoppe 
Source: https://dfcgen.rho62.de

Files: *
License: GPL-2.0
Copyright: 2006-2022 Ralf Hoppe 

Files: debian/*
License: GPL-2.0
Copyright: 2006-2022 Ralf Hoppe 
           2016-2022 Graham Inggs 

License: GPL-2.0
 This package is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License version 2 as
 published by the Free Software Foundation.
 .
 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 (see below); if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 .
 On Debian systems, the full text of the GNU General Public
 License version 2 can be found in the file
 `/usr/share/common-licenses/GPL-2'.