Introduce new JkOptions ForwardPhysicalAddress.
By default mod_jk will now forward the logical IP
address as provided e.g. by mod_remote_ip.
If JkOptions ForwardPhysicalAddress is set, it will
instead forward the physical IP address of the TCP peer.


git-svn-id: https://svn.apache.org/repos/asf/tomcat/jk/trunk@1566311 13f79535-47bb-0310-9956-ffa450edef68