req.max_stale_if_error
RTIME, can be read and set, but not unset.
Available inall subroutines.
The maximum stale age that is acceptable for a particular request.
beresp.stale_if_error limits the maximum stale age for each object.
For example, if beresp.stale_if_error for an object is set to one hour, but
req.max_stale_if_error is set to 10 minutes, 10 minutes is the maximum stale
age for that particular request. If beresp.stale_if_error for an object is
set to 10 minutes, but req.max_stale_if_error is set to one hour, 10 minutes
is the maximum stale age for that particular request.
