Replace Javadoc 5 link with Javadoc 6 hyperlink.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1306417 13f79535-47bb-0310-9956-ffa450edef68

Author: garydgregory

src/site/xdoc/userguide.xml

@@ -96,7 +96,7 @@
             <td>
               Simplifies common
               <a
-                href="http://download.oracle.com/javase/1.5.0/docs/api/java/security/MessageDigest.html">MessageDigest</a>
+                href="http://download.oracle.com/javase/6/docs/api/java/security/MessageDigest.html">MessageDigest</a>
               tasks.
             </td>
           </tr>