This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License version 3.

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 <http://www.gnu.org/licenses/>.

On Debian systems, a copy of the full license text is available in
/usr/share/common-licenses/GPL-3.