Merge r1552227 from trunk:

Remove <Proxy ~ wildcard-url> syntax which:
   - is equivalent to <ProxyMatch wildcard-url>
   - has never been documented
   - incorrectly checks parameters (!cmd->path should be !cmd->path[0])
   - is buggy (! is missing in front of strncasecmp)
Submitted by: jailletc36
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1555552 13f79535-47bb-0310-9956-ffa450edef68