When enabled, this directive makes Squid forward all accelerated/intercepted requests to the httpd_accel_host address. See Section 15.2.6.
If you enable this directive and httpd_accel_with_proxy, Squid may become susceptible to cache poisoning. Please read Chapter 15 thoroughly before running such a configuration.
httpd_accel_host, httpd_accel_port, httpd_accel_with_proxy, httpd_accel_uses_host_header