Option Name:url_rewrite_host_header
Default Value:url_rewrite_host_header on
Suggested Config:

	To preserve same-origin security policies in browsers and
	prevent Host: header forgery by redirectors Squid rewrites
	any Host: header in redirected requests.
	If you are running an accelerator this may not be a wanted
	effect of a redirector. This directive enables you disable
	Host: alteration in reverse-proxy traffic.
	WARNING: Entries are cached on the result of the URL rewriting
	process, so be careful if you have domain-virtual hosts.
	WARNING: Squid and other software verifies the URL and Host
	are matching, so be careful not to relay through other proxies
	or inspecting firewalls with this disabled.