DESC
(undescribed patch)
EDESC
This patch cleans up the uses of raw since I was playing with that code
anyway.  All uses of raw and the associated uses of tcgetattr have their
return values checked.
raw now prints an error is something went wrong instead of relying on a
flag passed in from the caller.
The now argument was dropped, and all callers get TCSADRAIN rather than
possibly TCSANOW.