Clarify licenses on a bunch of files.

net/third_party/nss/ssl/bodge/secure_memcmp.c

+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape security libraries.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1994-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
 // This file exists to provide the secure memcmp function. This was added in
 // NSS 3.12.5.
 
 #include <stdlib.h>
 
 /*
  * Perform a constant-time compare of two memory regions. The return value is
  * 0 if the memory regions are equal and non-zero otherwise.
  */
 int
 NSS_SecureMemcmp(const void *ia, const void *ib, size_t n)
 {
     const unsigned char *a = (const unsigned char*) ia;
     const unsigned char *b = (const unsigned char*) ib;
     size_t i;
     unsigned char r = 0;
 
     for (i = 0; i < n; ++i) {
         r |= *a++ ^ *b++;
     }
 
     return r;
 }