Lighttpd

Without this patch changes in lighty.request table don't go outside of mod_magnet.

Test case:
revproxy.lua:

lighty.request["Host"] = lighty.request["X-Forwarded-Host"]

index.cgi:

#! /usr/bin/perl
print "Content-Type: text/plain\n\n";

for (keys %ENV) {
        print $_, " => ", $ENV{$_}, "\n";
}

GET -H 'X-Forwarded-Host: www.example.com' !http://172.30.0.65/cgi/index.cgi

Request result (without patch):
HTTP_HOST => 172.30.0.65

Request result (with patch):
HTTP_HOST => www.example.com

This patch is really useful (together with mod_extforward) for lighttpd servers behind reverse proxy. In this scenario proxy adds special header (ex. X-Forwarded-Host:) with original Host: value and forwards requests to lighttpd.
Some CGI applications that depends on "correct" Host: header can work without modifications.

-- kupson