Copyright for libmarkdent-perl source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Markdent
Upstream-Contact: https://github.com/houseabsolute/Markdent/issues
Source: https://metacpan.org/release/Markdent
 https://github.com/houseabsolute/Markdent

Files: *
Copyright: 2019, Dave Rolsky 
License-Grant:
 This is free software;
 you can redistribute it and/or modify it
 under the same terms as the Perl 5 programming language system itself.
License: Artistic or GPL-1+
Comment:
 Perl 5 is licensed under either the Artistic license
 or the GNU General Public License version 1 or later.

Files: debian/*
Copyright: 2016-2019, Jonas Smedegaard 
License-Grant:
 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 3, or (at your option) any
 later version.
License: GPL-3+

License: Artistic
License-Reference: /usr/share/common-licenses/Artistic

License: GPL-1+
License-Reference: /usr/share/common-licenses/GPL-1

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