Copyright for hlins source package in Lunar

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: hlins
Upstream-Contact: Ralf Treinen 
Source: https://forge.ocamlcore.org/projects/hlins/

Files: *
Copyright: © 1999-2000 Ralf Treinen
License: GPL-2
 You are free to distribute this software under the terms of the GNU
 General Public License, version 2.
 On Debian systems, the complete text of the GNU General Public License
 version 2 can be found in /usr/share/common-licenses/GPL-2 file.