the patch bellow adds two new settings for mod_proxy_core:
For HTTP- proxying you may like to disable the backlog otherwise you'll get no 504 error and the browser will timeout without any message.
I've to set max-backlog-size to 0 which will generate a 504 right after the protocol fails. * host-disable-time
You can change the default 60seconds disable time now.
See r2601 and r2602
lighttpd 1.4.x supports "listen-backlog" and "disable-time" params