Description: Links against system installed javadocs.

--- a/build.xml
+++ b/build.xml
@@ -229,6 +229,8 @@
         <include name='gnu/mail/providers/mbox'/>
         <include name='gnu/mail/providers/maildir'/>
       </packageset>
+      <link href="/usr/share/doc/default-jdk-doc/api" />
+      <link href="/usr/share/doc/libgnuinet-java" />
     </javadoc>
   </target>