Fix LA-U and LA-F lookups in directory context. Previously

the current rewrite state was just used as lookup path, which lead to
strange and often useless results.

Related to PR 8493.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@101011 13f79535-47bb-0310-9956-ffa450edef68