Ensure that sessions IDs are not parsed from URLs for Contexts where disableURLRewriting is true

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1558822 13f79535-47bb-0310-9956-ffa450edef68
I'm going to withdraw this patch. I know it has enough votes to be committed but it does require some additional changes before the test case can be used.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1558827 13f79535-47bb-0310-9956-ffa450edef68