* mod_proxy_balancer: Allow for treatment of ';' char as a session

    deliminator/separator, ala mod_jk.
       PR: 45158
           Trunk version of patch:
                  http://svn.apache.org/viewvc?rev=686809&view=rev
                         http://svn.apache.org/viewvc?rev=687754&view=rev
                             Backport version for 2.2.x of patch:
                                    http://people.apache.org/~jim/patches/scolon-proxy.patch.txt
                                        +1: jim, rpluem, jerenkrantz




git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@696319 13f79535-47bb-0310-9956-ffa450edef68