Option Name:minimum_expiry_time
Default Value:minimum_expiry_time 60 seconds
Suggested Config:

	The minimum caching time according to (Expires - Date)
	headers Squid honors if the object can't be revalidated.
	The default is 60 seconds.

	In reverse proxy environments it might be desirable to honor
	shorter object lifetimes. It is most likely better to make
	your server return a meaningful Last-Modified header however.

	In ESI environments where page fragments often have short
	lifetimes, this will often be best set to 0.