Adjust CVE-2011-3368/CVE-2011-4317 fixes to rely solely on

core's translate-name to fail unsupported URIs.

Rewrite and proxy now decline what they don't support rather
than fail the request.

Suggested by: trawick
Implemented by: jorton
Tweaked by: wrowe


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1233604 13f79535-47bb-0310-9956-ffa450edef68