Reverse last commit: if the door.sys created by us needs fixing, this isn't the

way to do it. "cur_rate" is a legacy variable (from the serial modem days)
representing the current DCE rate, which can really be *any* number, including
the popular rates of 14400, 28800, and 33600, all of which are not "legal"
FOSSIL baud rates. But since a FOSSIL driver should only be concerned with the
DTE rate, this should be irrelevant.