Adds redirect to support already exported docs

git-svn-id: https://svn.apache.org/repos/asf/struts/site@1436268 13f79535-47bb-0310-9956-ffa450edef68
Adds redirect to support already exported docs

git-svn-id: https://svn.apache.org/repos/asf/struts/site@1436269 13f79535-47bb-0310-9956-ffa450edef68