Withdraw my mod_proxy_fcgi backport proposal

There has been some discussion over IRC about
possible performance issues with the current
code in certain scenarios (like a simple echo
FCGI backend that returns data as it comes in).

Jacob is working on a different solution, waiting
for his feedback before proceeding any further.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1802431 13f79535-47bb-0310-9956-ffa450edef68