Update debian/copyright: base64.*.

debian/copyright

@@ -495,6 +495,36 @@ License:
  provided the above notices are retained, and a notice that the code was
  modified is included with the above copyright notice.
 
+Files: third_party/base64.[ch]
+Copyright: Chris Venter <chris.venter@gmail.com>
+License:
+ 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 above
+    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 <COPYRIGHT HOLDER> ``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
+ <COPYRIGHT HOLDER> 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.
+
 Files: debian/* *
 Copyright: Aleksey Demakov,
  Aleksey Mashanov,