Adds support for Virtual resources to the DirResourceSet and JarResourceSet. This will allow an application to full traverse the resource hierarchy including any non-main resources mounted under a directory structure that does not exist in the main resources.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1430463 13f79535-47bb-0310-9956-ffa450edef68
Review the section on setting the environment variables.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1430481 13f79535-47bb-0310-9956-ffa450edef68
Need to follow new rules on paths

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1430486 13f79535-47bb-0310-9956-ffa450edef68
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54377
Correctly set request attributes for AccessLog in RemoteIpFilter
Patch by Violeta Georgieva

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1430487 13f79535-47bb-0310-9956-ffa450edef68
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=54381
Add support for receiving pong messages.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1430508 13f79535-47bb-0310-9956-ffa450edef68