Create Copyright.md

Copyright.md

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+unzip is copyrighted by Gilles Vollant, Jean-loup Gailly and Mark Adler
+LibTomCrypt is copyrighted Tom St Denis.
+LibTomMath is copyrighted Tom St Denis.
+maxmind_geoip.c is copyrighted by "MaxMind LLC".
+
+- LibTomMath and LibTomCrypt libraries are public domain, available at http://libtom.org/
+- unzip.c is part of zlib and contains own license agreements you can find below:
+- IO on .zip files using portions of zlib
+
+lines file(s),
+4301 src/qcommon/unzip.c,
+Copyright (C) 1998 Gilles Vollant,
+zlib is Copyright (C) 1995-1998 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.