This is a Debian native package.  The code is based on Joey Hess'
nslu2-flashkernel that used to be part of the nslu2-utils package.

Copyright:

Copyright (C) 2006  Joey Hess
Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2016  Martin Michlmayr <tbm@cyrius.com>
Copyright (C) 2011  Loïc Minier <lool@dooz.org>
Copyright (C) 2012-2016  Ian Campbell <ijc@debian.org>
Copyright (C) 2014-2016  Karsten Merker <merker@debian.org>

    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.

    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, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301,
    USA.

The complete text of the GNU General Public License, version 2, can be
found in /usr/share/common-licenses/GPL-2

The Debian packaging is licensed under the GPL, see above, and has
the following copyright:

Copyright (C) 2006, 2008  Martin Michlmayr <tbm@cyrius.com>