|  | Copyright 2000-2007 Niels Provos <provos@citi.umich.edu> | 
|  | Copyright 2007-2009 Niels Provos and Nick Mathewson | 
|  |  | 
|  | 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. The name of the author may not be used to endorse or promote products | 
|  | derived from this software without specific prior written permission. | 
|  |  | 
|  | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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. |