Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54932
Merged revision 1482799 from tomcat/trunk:
Fixed a broken link to Tribes documentation.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1482806 13f79535-47bb-0310-9956-ffa450edef68