Normally, when Radiator rejects an Access-Request, it sets the
reply message to "Request Denied". This optional parameter forces Radiator
to put an additional Reply- Message into Access-Reject indicating why the
rejection occurred. This may be useful for debugging in some cases, since
some NASs will display the Reply-Message during an interactive login.
However it should be noted that some PPP clients do not show the
Reply-Message to the end user.
# Show any rejection reason to the end user (maybe)
RejectHasReason