Copyright for powermgmt-base source package in Sid

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/

Files: *
Copyright: 2002 J. D. Thomas Hood 
           Rik Faith and Avery Pennarun 
           2002-2009 Chris Hanson
           2014 Marco d'Itri 
           2018 Adam Borowski 
License: GPL-2+
 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 2, or (at your option)
 any later version.
 .
 On Debian systems, the complete text of the GNU General Public License
 version 2 can be found in ‘/usr/share/common-licenses/GPL-2’.