VT100 and bagbiting

[gwyn at BRL-VLD.ARPA]

From:      Doug Gwyn (VLD/VMB) <gwyn at BRL-VLD.ARPA>

The VT100 requires NO padding even at 19.2Kb if you enable XON/XOFF
flow control and if your so-called UNIX handles XON/XOFF correctly.
Any really interesting video terminal could conceivably require flow
control to keep its buffer from being overrun at high baud rates
while doing time-consuming display operations, such as smooth
scrolling which is a big WIN.