add Cryptix license

LICENSE.txt

@@ -41,8 +41,8 @@ Public domain except as listed below:
    See licenses/LICENSE-SHA256.txt
 
    AES code:
-   Under the Cryptix (MIT) license, written by the Cryptix team
-   (That's what our website says but all our AES code looks like it is public domain)
+   Copyright (c) 1995-2005 The Cryptix Foundation Limited.
+   See licenses/LICENSE-Cryptix.txt
 
    Crypto filters:
    From the xlattice app - http://xlattice.sourceforge.net/

licenses/LICENSE-Cryptix.txt

@@ -0,0 +1,28 @@
+Cryptix General License
+
+Copyright (c) 1995-2005 The Cryptix Foundation Limited.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+  1. Redistributions of source code must retain the copyright notice,
+     this list of conditions and the following disclaimer.
+  2. 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 CRYPTIX FOUNDATION LIMITED AND
+CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
+INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+IN NO EVENT SHALL THE CRYPTIX FOUNDATION LIMITED OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.