Support Y:Lines, Z:Lines, and I:Lines, including IRC classes.

Give opers their class as defined on the O:Line when going umode +o
Close all client connections when the ircd becomes terminated.
Changed all server_wallops to their proper Bahamut counterparts.
Not all oper notices are global anymore, and fixed handling of KILL messages.
Added LOCOPS as per Bahamut in anticipation of proper GLOBOPS and CHATOPS.