Telebit TB+ ROM 5.0 + HDB uucp

[Mike Squires]

I found that the dialTBIT dialer provided by SCO with SCO XENIX 2.3.2 caused
my TB+ with 5.0 ROMs to hang, and never did dial out.  I found that using
the Dialers file instead solved my problem.  Dialing out with both TB+
and USR HST modems proved fairly simple, once the Dialers file was chosen.

One change required in dialTBIT.c was to change the alert character from
"a" to "A"; this improved things but did not eliminate problems.