another example script, a 'talker'
docfix
docfix
brevity imports
implement rudimentary xon/xon, remove dm, docfix
move _slc_process debug log to end of procedure
bugfix: request to send default tablet

this is a funky way to reproduce, begin server,
then SIGSTOP -- put server in background (^z)
then connect with bsd telnet client,
then escape ^] and type "slc check"
set _loop once, proper import paths
partially implement flow-control

not doing very well. it looks like we're going
to have to add a great deal of abstraction of
an additional stream writer buffer or some such
slc_send bug fix

as well as some doc/log clarities
move some class variables to be derive-overridable

as well as some docfixes
implement set a=1 b=2 c=3

previously only a=1 was evaluated
fix log(level  ..) reference
docfix for /help command output and tab-completion
remove 'eor', this was intended for IBM support

but we're nowhere near it, so chunk it out.
docfix/brevity in cmdset_command
go_ahead fix
send new line flow mode after client toggles xon_any
docfix
display full traceback in parsing errors

old apple version of netcat sends some pretty unpredictable and incorrect 2-byte iac commands with -t (now -T) argument, that triggered some exceptions. a traceback helps line up the stack frame.