In the default "on" setting Squid accepts certain forms
	of non-compliant HTTP messages where it is unambiguous
	what the sending application intended even if the message
	is not correctly formatted. The messages is then normalized
	to the correct form when forwarded by Squid.

	If set to "warn" then a warning will be emitted in cache.log
	each time such HTTP error is encountered.

	If set to "off" then such HTTP errors will cause the request
	or response to be rejected.