Register-Metronome-Tasks names a function, with lambda list
NIL:
Register certain metronome tasks for miscellaneous services.
This is a list of specific facilities that are started up during the
system boot process.
Websocket AYT facility
This facility, TOOTSVILLE AYT-IDLE-USERS runs every 120 seconds to detect and
disconnect users who are no longer actually connected. (Note that AYT
is netspeak for “are you there?”)