Backport AllowAnyURI related revisions from 2.2.x to pave the way for CVE-2011-4317

  http://svn.apache.org/viewvc?rev=1375113&view=rev 
  http://svn.apache.org/viewvc?rev=1447508&view=rev

Reviewed by:rjung, wrowe, covener




git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.0.x@1489910 13f79535-47bb-0310-9956-ffa450edef68