who can use it (`help !invite'). `userinvite pub' is the default.
:mode
-!channel [<chan>] mode *+...-...| (`mode *' is default.)
+!channel [<chan>] mode *|+...-... (`mode *' is default.)
If not set to `*' then whenever I'm alone in the channel I'll set
and unset the channel modes specified. Only the modes imnpst are
supported. Precede one or more mode letters with + to set, - to