CS	Allow only registered nicks on access list
CS	MLOCK +k: users who join an empty channel see the key
CS	MLOCK +i: doesn't kick a disallowed user if they're the first to
	   enter the channel
**	Don't keep all records in memory -- only load as needed, page out
	   when too much memory used
**	Do something about repeated password failures
**	Make Services split-aware:
	   - Nicks that split and rejoined will remain authenticated if
	     they were before
NS/CS	HELD option: nick/channel may not be registered.
NS	Nick linking -- all linked nicks are considered equivalent.
CS  ?	MKICK command: mass-kick the channel.
