Copyright for localslackirc source package in Buster

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Author: Salvo "LtWorf" Tomaselli 
Source: https://github.com/ltworf/localslackirc

Files: *
Copyright: 2018 Salvo "LtWorf" Tomaselli 
License: GPL-3
 This software is released under the GNU General Public License 3.
 .
 On Debian systems, the complete text of the GNU General Public License
 can be found in the /usr/share/common-licenses/GPL-3 file and the
 complete text of the GNU Lesser General Public License can be found in
 the /usr/share/common-licenses/LGPL-3 file.