Make mod_dir use a fixup for sending a redirect to the browser.

Before this, we were using a handler, which doesn't make much
sense, because the handler wasn't generating any data, it would
either return a redirect error code, or DECLINED.  This fits the
current hooks better.
Submitted by:	Ryan Morgan <rmorgan@covalent.net>


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@88255 13f79535-47bb-0310-9956-ffa450edef68