LTMONITOR

This is yet-another-idle-terminal-killer, or yaitk.  It looks for any
interactive process that has no subprocesses and kills if it has not
done anything for an hour or so.  It is called "LTMONITOR" because
it is used mainly for terminal server terminals, which are LT devices.

It isn't cheap to run, chalking up 10 minutes per day of CPU, but, so what.
