Indicates a positive response to the status inquiry.
At a minimum, this positive response indicates that the certificate
is not revoked, but does not necessarily mean that the certificate
was ever issued or that the time at which the response was produced
is within the certificate's validity interval.
csRevoked = 1
Indicates that the certificate has been revoked
(either permanantly or temporarily (on hold))
csUnknown = 2
Indicates that the responder doesn't know about
the certificate being requested.