synch up with trunk for the first half of RewriteRule:

PR#44838: be more up front with how the per-dir RewriteRule comparison is
the filesystem path minus the Directory the rules were listed in.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1055672 13f79535-47bb-0310-9956-ffa450edef68