Fixes a bug in mod_dir that causes a child process will infinitely

recurse when it attemps to handle a request for a directory wnd the
value of the DirectoryIndex directive is a single dot. Also likely
to happen for anyother values of DirectoryIndex that will map back
to the same directory. The handler now only considers regular files
as being index candidates.
PR:
Obtained from:
Submitted by: Raymond S Brand <rsbx@rsbx.net>
Reviewed by: dirkx


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83144 13f79535-47bb-0310-9956-ffa450edef68