Merge the r1545835 group from trunk:

 * r1545835, r1545845
   Prevent use with known buggy versions of httpd.
   Justification:
     Signal to our packagers that these versions have issues that they either
     need to upgrade or patch around.
   Votes:
     +1: breser, danielsh, philip



git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.7.x@1590205 13f79535-47bb-0310-9956-ffa450edef68