[squid-users] any badly broken webserver to test corner cases?

I was wondering what Squid developers use to test the proxy (or
generally, any other software which core usage is interacting with web
servers, like a web browser)?

Is there any "badly broken webserver" out there, which could be used to
test corner case Squid usage?

I mean broken by design, with configurable broken stuff, randomly
resetting connections, feeding rubbish in headers,
improper/unexpected/slow replies etc.

-- 
Tomasz Chmielewski
http://wpkg.org