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copyright notices
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Copyright (C) 1994, 1995 by Andrey A. Chernov, Moscow, Russia. All rights reserved.
Copyright (C) 1994-1996 Cronyx Engineering Ltd. Author: Serge Vakulenko, <vak@cronyx.ru> Heavily revamped to conform to RFC 1661. 
Copyright (C) 1997, Joerg Wunsch. RFC2472 IPv6CP support. 
Copyright (C) 1997-2003 Sony Computer Science Laboratories Inc. All rights reserved.
Copyright (C) 2000, Jun-ichiro itojun Hagino <itojun@iijlab.net>.
Copyright (C) 1998 Robert Nordier All rights reserved.
Copyright (C) 1999 Lennart Augustsson <augustss@netbsd.org> All rights reserved.
Copyright (C) 1999 MAEKAWA Masahide <bishop@rr.iij4u.or.jp>, Nick Hibma <n_hibma@freebsd.org> All rights reserved.
Copyright (C) 1999, 2001 Lennart Augustsson <augustss@netbsd.org> All rights reserved.
Copyright (C) 2000 Citrus Project, All rights reserved.
Copyright (C) 2000 Takuya SHIOZAKI All rights reserved.
Copyright (C) 2000, 2001 Citrus Project, All rights reserved.
Copyright (C) 2001 Daniel Hartmeier All rights reserved.
Copyright (C) 2001 Jakob Schlyter. All rights reserved.
Copyright (C) 2001 Michael Shalayeff All rights reserved.
Copyright (C) 2007-2008 Sam Leffler, Errno Consulting All rights reserved.
Copyright (C)1999 Citrus Project, All rights reserved.
Copyright (C)1999, 2000, 2001 Citrus Project, All rights reserved.
Copyright (C)1999, 2000, 2001, 2002 Citrus Project, All rights reserved.
Copyright (C)1999, 2002 Citrus Project, All rights reserved.
Copyright (C)1999, 2001 Citrus Project, All rights reserved.
Copyright (C)2001 Citrus Project, All rights reserved.
Copyright (C)2002 Citrus Project, All rights reserved.
Copyright (C)2002 YAMAMOTO Takashi, All rights reserved.
Copyright 1999, 2000 by Jef Poskanzer <jef@acme.com>. All rights reserved.
Copyright 2001 Niels Provos <provos@citi.umich.edu> All rights reserved.
Copyright 2002 Niels Provos <provos@citi.umich.edu> All rights reserved.
Copyright (C) 1995 by Jef Poskanzer <jef@acme.com>. All rights reserved.
Copyright (C) 1995, 2000 by Jef Poskanzer <jef@acme.com>. All rights reserved.