Graham submitted a patch which fixes a problem with the proxy

configuration where globally set configuration options were
overridden inside virtual hosts.
Also, ProxyReceiveBufferSize default values were left uninitialised.

Submitted by:	Graham Leggett <minfrin@sharp.fm>
Reviewed by:	Martin Kraemer


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@83967 13f79535-47bb-0310-9956-ffa450edef68