Merge r1701436 from trunk:

allow autoindex w/o mod_dir/mod_mime setting the DIR_MAGIC_TYPE.


Submitted by: covener
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1703404 13f79535-47bb-0310-9956-ffa450edef68