This is udns, written and maintained by Michael Tokarev <mjt@corpit.ru>

The original source can always be found at:
	http://www.corpit.ru/mjt/udns.html

Copyright (C) 2005,2006,2007  Michael Tokarev

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   This library 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 Lesser Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

On Debian systems, the complete text of the GNU Lesser General
Public License can be found in `/usr/share/common-licenses/LGPL'.