axe the discussion on the possibility of backporting

the remaining DefaultRuntimeDir functionality to the
2.4.x branch in a way that doesn't break existing
configs; the most recent info is on the dev list anyway


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1541195 13f79535-47bb-0310-9956-ffa450edef68