Normally Squid will automatically determine an optimal ICP
	query timeout value based on the round-trip-time of recent ICP
	queries.  If you want to override the value determined by
	Squid, set this 'icp_query_timeout' to a non-zero value.  This
	value is specified in MILLISECONDS, so, to use a 2-second
	timeout (the old default), you would write:

		icp_query_timeout 2000