Merge r1676085 from trunk:

consistently output SSLCertificateChainFile deprecation warnings
Submitted by: kbrand
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1678233 13f79535-47bb-0310-9956-ffa450edef68