Lighttpd

Hello,

this patch adds a new header X-Rewrite-Method to mod_proxy_core, upon detection of which the method of the redirected request is set and, depending on the new method, the response from the first backend call is used as the request body for the second one.

This way, I can conveniently tunnel POST requests with the accompanying data through a FastCGI backend for authentication.

Currently it supports GET, POST, HEAD, and CONNECT; do any other methods make sense in this context?