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Acknowledgments

MD5 library

    This software is in the public domain. Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, without any conditions or restrictions. This software is provided "as is" without express or implied warranty.

    The MD5 message-digest algorithm was developed by Ron Rivest. The public domain C language implementation used in this program was written by Colin Plumb in 1993, no copyright is claimed. This code is in the public domain; do with it what you wish. Equivalent code is available from RSA Data Security, Inc. This code has been tested against that, and is equivalent.
Brutally hacked by John Walker back from ANSI C to K&R (no prototypes) to maintain the tradition that Netfone will compile with Sun's original "cc".

DEFLATE library

deflate.c -- compress data using the deflation algorithm
Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler
For conditions of distribution and use, see copyright notice in zlib.h
ACKNOWLEDGEMENTS
    The idea of lazy evaluation of matches is due to Jan-Mark Wams, and I found it in 'freeze' written by Leonid Broukhis. Thanks to many people for bug reports and testing.
REFERENCES
    Deutsch, L.P.,"DEFLATE Compressed Data Format Specification". Available in http://tools.ietf.org/html/rfc1951
    A description of the Rabin and Karp algorithm is given in the book "Algorithms" by R. Sedgewick, Addison-Wesley, p252.
    Fiala,E.R., and Greene,D.H. Data Compression with Finite Windows, Comm.ACM, 32,4 (1989) 490-595

ZLIB library

zlib.h -- interface of the 'zlib' general purpose compression library
version 1.3, August 18th, 2023
Copyright (C) 1995-2023 Jean-loup Gailly and Mark Adler
This software is provided 'as-is', without any express or implied warranty.  In no event will the authors be held liable for any damages arising from the use of this software.
Permission is granted to anyone to use this software for any purpose, including commercial applications, and to alter it and redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
Jean-loup Gailly        Mark Adler
jloup@gzip.org          madler@alumni.caltech.edu
The data format used by the zlib library is described by RFCs (Request for Comments) 1950 to 1952 in the files http://tools.ietf.org/html/rfc1950
(zlib format), rfc1951 (deflate format) and rfc1952 (gzip format).

Huffman trees library

inftrees.c -- generate Huffman trees for efficient decoding
Copyright (C) 1995-2023 Mark Adler
For conditions of distribution and use, see copyright notice in zlib.h
If you use the zlib library in a product, an acknowledgment is welcome in the documentation of your product. If for some reason you cannot include such an acknowledgment, I would appreciate that you keep this copyright string in the executable of your product.