Is there a way to force a minimum age on 404 errors? We have a situation where it appears 404s are getting cached, and squid is honoring the TTLs of the webserver (could be hours/days). So the 404s persist after the default negative ttl of 5 minutes. Can we force this to 5 minutes regardless of the TTL that is passed by the webserver? Maybe an acl/refresh pattern or something? Didn't see anything for 404s. Thanks!