Reorganize and speed up MD5.

Submitted by: Andy Polyakov <appro@fy.chalmers.se>
diff --git a/CHANGES b/CHANGES
index 770bd19..a3a90dd 100644
--- a/CHANGES
+++ b/CHANGES
@@ -5,6 +5,9 @@
 
  Changes between 0.9.2b and 0.9.3
 
+  *) Reorganize and speed up MD5.
+     [Andy Polyakov <appro@fy.chalmers.se>]
+
   *) VMS support.
      [Richard Levitte <richard@levitte.org>]