Copyright (c) 2007 Seccuris Inc.
 All rights reserved.

 This software was developed by Robert N. M. Watson under contract to
 Seccuris Inc.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions
 are met:
 1. Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.
 2. Redistributions in binary form must reproduce the above copyright
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.

 THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 SUCH DAMAGE.

 Copyright (c) 1990 The Regents of the University of California.
 All rights reserved.

 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that: (1) source code distributions
 retain the above copyright notice and this paragraph in its entirety, (2)
 distributions including binary code include the above copyright notice and
 this paragraph in its entirety in the documentation or other materials
 provided with the distribution, and (3) all advertising materials mentioning
 features or use of this software display the following acknowledgement:
 ``This product includes software developed by the University of California,
 Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
 the University nor the names of its contributors may be used to endorse
 or promote products derived from this software without specific prior
 written permission.
 THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.

 This document is derived in part from the enet man page (enet.4)
 distributed with 4.3BSD Unix.