Copyright for lzd source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: Lzd
Upstream-Contact: lzip-bug@nongnu.org
Source: http://download.savannah.gnu.org/releases/lzip/

Files: *
Copyright: 2013-2019 Antonio Diaz Diaz 
License: PD

Files: debian/*
Copyright: 2013-2020 Daniel Baumann 
License: PD

License: PD
 This program is free software: you have unlimited permission
 to copy, distribute and modify it.
 .
 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.