SECURITY: The default installation could lead to mod_negotiation

and mod_dir/mod_autoindex displaying a directory listing instead of
the index.html.* files, if a very long path was created artificially
by using many slashes. Now a 403 FORBIDDEN is returned.

Reviewed by:	Jim Jagielski, Tony Finch


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@88112 13f79535-47bb-0310-9956-ffa450edef68