libevent

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 Libevent is available for use under the following license, commonly known
 as the 3-clause (or &quot;modified&quot;) BSD license:

 ==============================
 Copyright (c) 2000-2007 Niels Provos &lt;provos@citi.umich.edu&gt;
 Copyright (c) 2007-2010 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&#x27;&#x27; 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.
 ==============================

 Portions of Libevent are based on works by others, also made available by
 them under the three-clause BSD license above.  The copyright notices are
 available in the corresponding source files; the license is as above.  Here&#x27;s
 a list:

 log.c:
    Copyright (c) 2000 Dug Song &lt;dugsong@monkey.org&gt;
    Copyright (c) 1993 The Regents of the University of California.

 strlcpy.c:
    Copyright (c) 1998 Todd C. Miller &lt;Todd.Miller@courtesan.com&gt;

 win32.c:
    Copyright (c) 2003 Michael A. Davis &lt;mike@datanerds.net&gt;

 evport.c:
    Copyright (c) 2007 Sun Microsystems

 min_heap.h:
    Copyright (c) 2006 Maxim Yegorushkin &lt;maxim.yegorushkin@gmail.com&gt;

 tree.h:
    Copyright 2002 Niels Provos &lt;provos@citi.umich.edu&gt;