Includes known aliases for AdminServ (/as), BotServ (/bs), ChanServ
(/cs), HelpServ (/hs), HostServ (/hs; /ho on some IRCds), MemoServ
(/ms), NickServ (/ns), OperServ (/os), and RootServ (/rs).
Not all IRCds will have all of these services available, but it's not
trivial to filter out the ones that don't exist on a particular network.