Merge r1585918 from trunk:

Only read "active" values from the key_files array. PR 56306.

Submitted by: kbrand
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1588246 13f79535-47bb-0310-9956-ffa450edef68