Merge r880794 from trunk:

Build: fix --with-module to work as documented
PR 43881
Submitted: Gez Saunders
Reviewed: Nick Kew


Submitted by: niq
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@892259 13f79535-47bb-0310-9956-ffa450edef68