Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=55404
Log warnings about using security roles that are not defined in web.xml as warnings

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1539580 13f79535-47bb-0310-9956-ffa450edef68
Add a response

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1539583 13f79535-47bb-0310-9956-ffa450edef68
Clarify

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1539584 13f79535-47bb-0310-9956-ffa450edef68