Copyright (c) 2010--2021, Olaf Bergmann and others
All rights reserved.

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modification, are permitted provided that the following conditions are
met:

  o Redistributions of source code must retain the above copyright
    notice, this list of conditions and the following disclaimer.

  o 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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========================================================================
getopt.c

License information for getopt.c. This file is only used on Windows
builds of the executables in the examples folder:

/*
 * This file was copied from the following newsgroup posting:
 *
 * Newsgroups: mod.std.unix
 * Subject: public domain AT&T getopt source
 * Date: 3 Nov 85 19:34:15 GMT
 *
 * Here's something you've all been waiting for:  the AT&T public domain
 * source for getopt(3).  It is the code which was given out at the 1985
 * UNIFORUM conference in Dallas.  I obtained it by electronic mail
 * directly from AT&T.  The people there assure me that it is indeed
 * in the public domain.
 */

========================================================================
uthash

libcoap uses uthash.h and utlist.h from Troy D. Hanson
(https://troydhanson.github.io/uthash/). These files use the revised
BSD license (BSD-1-Clause license) as included in these two source
files.

========================================================================
OpenSSL

Binaries that are linked against OpenSSL include software developed
by the OpenSSL Project for use in the OpenSSL Toolkit.
(http://www.openssl.org/). Please consult the OpenSSL license
(https://www.openssl.org/source/license.html) for licensing terms.

========================================================================
GnuTLS

When compiled with GnuTLS support, this software includes components
that are licensed under the terms of the the GNU Lesser General Public
License, version 2.1
(https://www.gnu.org/licenses/old-licenses/lgpl-2.1.html).

========================================================================
tinyDTLS

When compiled with tinyDTLS support, this software includes components
that are licensed under the terms of the Eclipse Distribution License 1.0
(http://www.eclipse.org/org/documents/edl-v10.php).

========================================================================
Mbed TLS

When compiled with Mbed TLS support, this software includes components
that are licensed under the terms of the Apache 2.0 license
(http://www.apache.org/licenses/LICENSE-2.0).