Roomsettings: Add enabling/disabling tournaments (#2765)
Roomsettings: Add enabling/disabling tournaments (#2765)

The main reason I think this should be added is that a lot of people don't know this command, and so having it in the roomsettings should make it better-known to the relevant users that it's actually a thing.
zek7rom/SpacialGaze,sirDonovan/Pokemon-Showdown,danpantry/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,urkerab/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,AustinXII/Pokemon-Showdown,azum4roll/Pokemon-Showdown,urkerab/Pokemon-Showdown,ShowdownHelper/Saffron,svivian/Pokemon-Showdown,xCrystal/Pokemon-Showdown,ShowdownHelper/Saffron,Git-Worm/City-PS,TbirdClanWish/Pokemon-Showdown,TbirdClanWish/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,Lord-Haji/SpacialGaze,svivian/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,azum4roll/Pokemon-Showdown,Elveman/RPCShowdownServer,AustinXII/Pokemon-Showdown,xfix/Pokemon-Showdown,Guernouille/Pokemon-Showdown,jd4564/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,HoeenCoder/SpacialGaze,Mystifi/Exiled,Enigami/Pokemon-Showdown,danpantry/Pokemon-Showdown,Sora-League/Sora,panpawn/Gold-Server,KewlStatics/Alliance,HoeenCoder/SpacialGaze,xfix/Pokemon-Showdown,ShowdownHelper/Saffron,ZestOfLife/FestiveLife,AWailOfATail/Pokemon-Showdown,DesoGit/Tsunami_PS,aakashrajput/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,xCrystal/Pokemon-Showdown,DesoGit/Tsunami_PS,SolarisFox/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,Mystifi/Exiled,Elveman/RPCShowdownServer,Lord-Haji/SpacialGaze,DarkSuicune/Pokemon-Showdown,panpawn/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,DesoGit/Tsunami_PS,svivian/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,Git-Worm/City-PS,Lord-Haji/SpacialGaze,PS-Spectral/Spectral,CreaturePhil/Showdown-Boilerplate,Zarel/Pokemon-Showdown,panpawn/Pokemon-Showdown,SolarisFox/Pokemon-Showdown,Guernouille/Pokemon-Showdown,HoeenCoder/SpacialGaze,AWailOfATail/Pokemon-Showdown,Mystifi/Exiled,sirDonovan/Pokemon-Showdown,panpawn/Gold-Server,KewlStatics/Shit,Enigami/Pokemon-Showdown,HoeenCoder/SpacialGaze,ZestOfLife/FestiveLife,CreaturePhil/Showdown-Boilerplate,Volcos/SpacialGaze,panpawn/Gold-Server,svivian/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,xfix/Pokemon-Showdown,Zarel/Pokemon-Showdown,svivian/Pokemon-Showdown,jd4564/Pokemon-Showdown,Sora-League/Sora,PS-Spectral/Spectral,jumbowhales/Pokemon-Showdown,Pikachuun/Pokemon-Showdown,Zarel/Pokemon-Showdown,xfix/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,AustinXII/Pokemon-Showdown,cadaeic/Pokemon-Showdown,xCrystal/Pokemon-Showdown,PS-Spectral/Spectral,cadaeic/Pokemon-Showdown,Sora-League/Sora,urkerab/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,zek7rom/SpacialGaze,Enigami/Pokemon-Showdown,Volcos/SpacialGaze,Kokonoe-san/Glacia-PS,Kokonoe-san/Glacia-PS,xfix/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,KewlStatics/Shit,KewlStatics/Alliance,Enigami/Pokemon-Showdown