Copyright for tendermint-go-db source package in Buster

Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: go-db
Source: https://github.com/tendermint/go-db

Files: *
Copyright: 2015 Tendermint
License: GPL-3.0+

Files: debian/*
Copyright: 2016 Alessio Treglia 
License: GPL-3.0+
Comment: Debian packaging is licensed under the same terms as upstream

License: GPL-3.0+
 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 3 of the License, or
 (at your option) any later version.
 .
 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.  See the
 GNU General Public License for more details.
 .
 You should have received a copy of the GNU General Public License
 along with this program.  If not, see .
 .
 On Debian systems, the complete text of the license can be
 found in `/usr/share/common-licenses/GPL-3.0'.