Copyright (c) 1997, 1998, 1999


The Regents of the University of Michigan ("The Regents") and Merit Network,
Inc.  All rights reserved.
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.
3.  All advertising materials mentioning features or use of 
    this software must display the following acknowledgement:  
This product includes software developed by the University of Michigan, Merit
Network, Inc., and their contributors. 
4.  Neither the name of the University, Merit Network, nor the
    names of their contributors may be used to endorse or 
    promote products derived from this software without 
    specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.