The rra-c-util package as a whole is:

  Copyright 2000, 2009, 2010 Russ Allbery <rra@stanford.edu>
  Copyright 2009, 2010, 2011
      The Board of Trustees of the Leland Stanford Junior University

The package is collectively released under the following license:

  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

All individual files without an explicit exception below are released
under this license.  Some files may have additional copyright holders as
noted in those files.

Some files in this distribution are individually released under different
licenses, all of which are compatible with the above general package
license but which may require preservation of additional notices.  All
required notices are preserved in this file.  Each file intended for
copying into other software packages contains a copyright and license
notice at the top of the file.  Please take note of any attribution and
notice requirements specified in that license.

Collected copyright notices for the entire package:

  Copyright 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
      2010 Russ Allbery <rra@stanford.edu>
  Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
      The Board of Trustees of the Leland Stanford Junior University
  Copyright 2004, 2005, 2006, 2007, 2008, 2009, 2010
      by Internet Systems Consortium, Inc. ("ISC")
  Copyright 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
      2003 by The Internet Software Consortium and Rich Salz
  Copyright 2007 Markus Moeller
  Copyright 1985-2005 Massachusetts Institute of Technology
  Copyright 1997, 2000, 2001, 2002 Benjamin Sittler
  Copyright 1995 Patrick Powell
  Copyright 1996, 1997 Brandon Long <blong@fiction.net>
  Copyright 1998 Thomas Roessler <roessler@guug.de>
  Copyright 1998 Michael Elkins <me@cs.hmc.edu>
  Copyright 1998 Andrew Tridgell <tridge@samba.org>
  Copyright 2000, 2005 Hrvoje Niksic <hniksic@xemacs.org>
  Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
      2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
      Free Software Foundation, Inc.
  Copyright 1994 X Consortium

The files kafs/sys-syscall.c, mkusage, pam-util/vector.c,
pam-util/vector.h, portable/asprintf.c, portable/daemon.c,
portable/dummy.c, portable/getaddrinfo.c, portable/getaddrinfo.h,
portable/getnameinfo.c, portable/getnameinfo.h, portable/gssapi-mech.c,
portable/gssapi.h, portable/inet_aton.c, portable/inet_ntoa.c,
portable/inet_ntop.c, portable/issetuidgid.c, portable/krb4.h,
portable/krb5-extra.c, portable/krb5.h, portable/macros.h,
portable/mkstemp.c, portable/pam.h, portable/pam_syslog.c,
portable/pam_vsyslog.c, portable/setenv.c, portable/seteuid.c,
portable/stdbool.h, portable/strlcat.c, portable/strlcpy.c,
portable/strndup.c, portable/system.h, portable/uio.h, portable/winsock.c,
tests/pam-util/vector-t.c, tests/portable/asprintf-t.c,
tests/portable/daemon-t.c, tests/portable/getaddrinfo-t.c,
tests/portable/getnameinfo-t.c, tests/portable/inet_aton-t.c,
tests/portable/inet_ntoa-t.c, tests/portable/inet_ntop-t.c,
tests/portable/mkstemp-t.c, tests/portable/setenv-t.c,
tests/portable/strlcat-t.c, tests/portable/strlcpy-t.c,
tests/portable/strndup-t.c, tests/util/buffer-t.c, tests/util/concat-t.c,
tests/util/vector-t.c, util/concat.c, util/concat.h, util/macros.h,
util/vector.c, and util/vector.h are covered by the following statement:

    The authors hereby relinquish any claim to any copyright that they may
    have in this work, whether granted under contract or by operation of
    law or international treaty, and hereby commit to the public, at
    large, that they shall not, at any time in the future, seek to enforce
    any copyright in this work against any person or entity, or prevent
    any person or entity from copying, publishing, distributing or
    creating derivative works of this work.

In other words, you can do anything you wish with this code, although I
would strongly prefer that any improvements or modifications be sent to me
(rra@stanford.edu) so that I can continue to maintain a canonical version.

The files configure.ac, m4/apache.m4, m4/apr.m4, m4/aprutil.m4,
m4/curl.m4, m4/gssapi.m4, m4/inet-ntoa.m4, m4/kafs.m4, m4/krb4.m4,
m4/krb5.m4, m4/ld-version.m4, m4/ldap.m4, m4/lib-depends.m4,
m4/lib-pathname.m4, m4/pam-const.m4, m4/pcre.m4, m4/remctl.m4,
m4/snprintf.m4, m4/ssl.m4, and m4/vamacros.m4 are released under the
following copyright and license:

  Copyright 1999, 2000, 2001, 2003 Russ Allbery <rra@stanford.edu>
  Copyright 2005, 2006, 2007, 2008, 2009, 2010, 2011
      The Board of Trustees of the Leland Stanford Junior University
  Copyright 2007, 2008 Markus Moeller
  Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.

  This file is free software; the authors give unlimited permission to
  copy and/or distribute it, with or without modifications, as long as
  this notice is preserved.

The files m4/socket-unix.m4, m4/socket.m4, portable/socket.h,
util/buffer.c, util/buffer.h, util/fdflag.c, util/fdflag.h,
util/messages.c, util/messages.h, util/network.c, util/network.h,
util/xmalloc.c, util/xmalloc.h, util/xwrite.c, and util/xwrite.h are
released under the following copyright and license:

  Copyright 2008, 2009, 2010, 2011
      The Board of Trustees of the Leland Stanford Junior University
  Copyright (c) 2004, 2005, 2006, 2007, 2008, 2009, 2010
      by Internet Systems Consortium, Inc. ("ISC")
  Copyright (c) 1991, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
      2002, 2003 by The Internet Software Consortium and Rich Salz

  This code is derived from software contributed to the Internet Software
  Consortium by Rich Salz.

  Permission to use, copy, modify, and distribute this software for any
  purpose with or without fee is hereby granted, provided that the above
  copyright notice and this permission notice appear in all copies.

  THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY
  SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

The file portable/krb5-profile.c is taken from the MIT Kerberos
distribution and is released under the following copyright and license:

  Copyright (C) 1985-2005 by the Massachusetts Institute of Technology.

  All rights reserved.

  Export of this software from the United States of America may require
  a specific license from the United States Government.  It is the
  responsibility of any person or organization contemplating export to
  obtain such a license before exporting.

  WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
  distribute this software and its documentation for any purpose and
  without fee is hereby granted, provided that the above copyright
  notice appear in all copies and that both that copyright notice and
  this permission notice appear in supporting documentation, and that
  the name of M.I.T. not be used in advertising or publicity pertaining
  to distribution of the software without specific, written prior
  permission.  Furthermore if you modify this software you must label
  your software as modified software and not distribute it in such a
  fashion that it might be confused with the original MIT software.
  M.I.T. makes no representations about the suitability of this software
  for any purpose.  It is provided "as is" without express or implied
  warranty.

  THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.

  Individual source code files are copyright MIT, Cygnus Support,
  OpenVision, Oracle, Sun Soft, FundsXpress, and others.

  Project Athena, Athena, Athena MUSE, Discuss, Hesiod, Kerberos, Moira,
  and Zephyr are trademarks of the Massachusetts Institute of Technology
  (MIT).  No commercial use of these trademarks may be made without
  prior written permission of MIT.

  "Commercial use" means use of a name in a product or other for-profit
  manner.  It does NOT prevent a commercial firm from referring to the
  MIT trademarks in order to convey information (although in doing so,
  recognition of their trademark status should be given).

The files portable/snprintf.c and tests/portable/snprintf-t.c are released
under the following license:

  This code is based on code written by Patrick Powell (papowell@astart.com)
  It may be used for any purpose as long as this notice remains intact
  on all source code distributions

The files Makefile.in and aclocal.m4 are generated by GNU Automake and
released under the following copyright and license:

  Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
  2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software Foundation,
  Inc.  This file is free software; the Free Software Foundation gives
  unlimited permission to copy and/or distribute it, with or without
  modifications, as long as this notice is preserved.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY, to the extent permitted by law; without
  even the implied warranty of MERCHANTABILITY or FITNESS FOR A
  PARTICULAR PURPOSE.

The file configure is generated by GNU Autoconf and is released under the
following copyright and license:

  Copyright (C) 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2000, 2001,
  2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Free Software
  Foundation, Inc.  This configure script is free software; the Free
  Software Foundation gives unlimited permission to copy, distribute and
  modify it.

The files build-aux/depcomp and build-aux/missing are taken from GNU
Automake.  The files build-aux/config.guess and build-aux/config.sub are
taken from the Debian autotools-dev package.  These files are released
under the following copyright and license:

  Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
  2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free
  Software Foundation, Inc.

  This program is free software; you can redistribute it and/or modify it
  under the terms of the GNU General Public License as published by the
  Free Software Foundation; either version 2, or (at your option) any
  later version.

  This program is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  General Public License for more details.

  As a special exception to the GNU General Public License, if you
  distribute this file as part of a program that contains a configuration
  script generated by Autoconf, you may include it under the same
  distribution terms that you use for the rest of that program.

For the rra-c-util distribution, the option described in the last
paragraph has been accepted and these files are distributed under the same
terms as the rra-c-util package as a whole, as described at the top of
this file.

The file build-aux/install-sh is released under the following copyright
and license:

  Copyright (C) 1994 X Consortium

  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the
  "Software"), to deal in the Software without restriction, including
  without limitation the rights to use, copy, modify, merge, publish,
  distribute, sublicense, and/or sell copies of the Software, and to
  permit persons to whom the Software is furnished to do so, subject to
  the following conditions:

  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  IN NO EVENT SHALL THE X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR
  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.

  Except as contained in this notice, the name of the X Consortium shall
  not be used in advertising or otherwise to promote the sale, use or
  other dealings in this Software without prior written authorization
  from the X Consortium.

  FSF changes to this file are in the public domain.
