Get proxy CONNECT basically working (IE seems to be happy with secure

connections).

The to-do of fixing client I/O so it goes through the filters still
remains.  But it will be nice if it will work until somebody gets
around to doing that.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@94971 13f79535-47bb-0310-9956-ffa450edef68