Using terminals at 19.2 kbaud on 4.2

[Bob Hoffman]

19.2Kbps works just fine on our 4.2bsd 11/780 with a DEC DZ-11A
mux.  Just say 'stty exta'.  External A is really 19.2Kbps.  I've
had no problems with it (yet).  Plessey DZ-11 equivalents do the
same thing, too.

	---Bob Hoffman, Pitt CS