Merge r678761 from trunk:

* Ensure that the SSL filters are not inserted on FTP data connections even
  if the virtual host that causes the proxy request has SSL enabled.

Submitted by: rpluem
Reviewed by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@686393 13f79535-47bb-0310-9956-ffa450edef68