Make the HTTP request information available via the session

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1446247 13f79535-47bb-0310-9956-ffa450edef68
UCDetector
- use final
- remove unused code

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1446254 13f79535-47bb-0310-9956-ffa450edef68