Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55746
Add documentation for AllRolesMode for CombinedRealm
Patch by Cédric Couralet

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1540374 13f79535-47bb-0310-9956-ffa450edef68
Simplify (remove unused code)

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1540383 13f79535-47bb-0310-9956-ffa450edef68
Simplify - merge unused constructor into used constructor

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1540384 13f79535-47bb-0310-9956-ffa450edef68