Copyright for libgo-perl source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Source: https://metacpan.org/release/go-perl/

Files: *
Copyright: 2000-2013 Chris Mungall 
License: Perl

Files: debian/*
Copyright: 2008-2014 Charles Plessy 
           2013 Laszlo Kajan  
           2016-2018 Andreas Tille 
License: Perl

License: Perl
 This program is free software; you can redistribute it and/or modify
 it under the terms of either:
 .
 a) the GNU General Public License as published by the Free Software
    Foundation; either version 1, or (at your option) any later
    version, or
 .
 b) the "Artistic License" which comes with Perl.
Comment: On Debian systems, the complete text of the latest version of the GNU
 General Public License version 1 can be found in
 ‘/usr/share/common-licenses/GPL-1’, while the complete text of the Artistic
 License can be found in ‘/usr/share/common-licenses/Artistic’.