Copyright for request_key.2:

Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
    Written by David Howells (
and Copyright (C) 2016 Michael Kerrisk <>

License for request_key.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 of the License, or (at your option) any later version.