Copyright for backport9 source package in Mantic

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: backport9
Source: https://github.com/headius/backport9

Files: *
Copyright: 2018-2020, Charles Oliver Nutter 
License: Apache-2.0

Files: debian/*
Copyright: 2020, Louis-Philippe Véronneau 
License: GPL-3+

License: Apache-2.0
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at
 .
     http://www.apache.org/licenses/LICENSE-2.0
 .
 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 .
 On Debian systems, the complete text of the Apache License 2.0 can
 be found in "/usr/share/common-licenses/Apache-2.0"

License: GPL-3+
 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; version 3, or (at your option) any
 later version.
 .
 On Debian systems, the complete text of version 3 of the GNU General
 Public License can be found in '/usr/share/common-licenses/GPL-3'.