Add service aliases to command list for completion

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.

client/js/constants.js

@@ -20,19 +20,24 @@ const colorCodeMap = [
 ];
 
 const commands = [
+	"/as",
 	"/away",
 	"/back",
 	"/ban",
 	"/banlist",
+	"/bs",
 	"/close",
 	"/collapse",
 	"/connect",
+	"/cs",
 	"/ctcp",
 	"/cycle",
 	"/deop",
 	"/devoice",
 	"/disconnect",
 	"/expand",
+	"/ho",
+	"/hs",
 	"/invite",
 	"/join",
 	"/kick",
@@ -40,15 +45,19 @@ const commands = [
 	"/list",
 	"/me",
 	"/mode",
+	"/ms",
 	"/msg",
 	"/nick",
 	"/notice",
+	"/ns",
 	"/op",
+	"/os",
 	"/part",
 	"/query",
 	"/quit",
 	"/raw",
 	"/rejoin",
+	"/rs",
 	"/say",
 	"/send",
 	"/server",