leaving force-proxy-request-1.0 for broken clients, revert my
  patch for forcing an HTTP/1.0 proxy request, if the client 
  request is HTTP/1.0, per Roy.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@219221 13f79535-47bb-0310-9956-ffa450edef68