fix javadoc links [COMMONSSITE-74]

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1452095 13f79535-47bb-0310-9956-ffa450edef68
fix cgi file name

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/codec/trunk@1452097 13f79535-47bb-0310-9956-ffa450edef68