We need to clear the Proxy-Connection header or connections can hang

when we are talking to a remote server that looks like an origin server
to us but is really being a reverse proxy, etc.

This shows what a dumb idea this header was to begin with.

PR: 1741
Obtained from:
Submitted by:
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80561 13f79535-47bb-0310-9956-ffa450edef68