Merge r1756846 from trunk:

Remove unused typedef uthn_dbd_conf
Submitted by: jailletc36
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1759468 13f79535-47bb-0310-9956-ffa450edef68