Update client SockJS URL
Update client SockJS URL

It was previously entirely wrong! We haven't supported iframes as a
transport for a long time! Unsurprisingly, no one complained since
we don't support particularly old browsers and even old browsers
support JSONP polling...

xCrystal/Pokemon-Showdown,panpawn/Pokemon-Showdown,ShowdownHelper/Saffron,xfix/Pokemon-Showdown,urkerab/Pokemon-Showdown,cadaeic/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,CharizardtheFireMage/Showdown-Boilerplate,Guernouille/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,Enigami/Pokemon-Showdown,svivian/Pokemon-Showdown,Zarel/Pokemon-Showdown,EienSeiryuu/Pokemon-Showdown,HoeenCoder/SpacialGaze,Zarel/Pokemon-Showdown,Kokonoe-san/Glacia-PS,HoeenCoder/SpacialGaze,DesoGit/Tsunami_PS,CreaturePhil/Showdown-Boilerplate,AustinXII/Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,PS-Spectral/Spectral,aakashrajput/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,xfix/Pokemon-Showdown,Lord-Haji/SpacialGaze,sirDonovan/Pokemon-Showdown,Mystifi/Exiled,danpantry/Pokemon-Showdown,SolarisFox/Pokemon-Showdown,zek7rom/SpacialGaze,Guernouille/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,cadaeic/Pokemon-Showdown,xfix/Pokemon-Showdown,ShowdownHelper/Saffron,danpantry/Pokemon-Showdown,Flareninja/Showdown-Boilerplate,Git-Worm/City-PS,azum4roll/Pokemon-Showdown,Git-Worm/City-PS,Pikachuun/Pokemon-Showdown,Mystifi/Exiled,Elveman/RPCShowdownServer,jd4564/Pokemon-Showdown,xCrystal/Pokemon-Showdown,Volcos/SpacialGaze,svivian/Pokemon-Showdown,TbirdClanWish/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,sirDonovan/Pokemon-Showdown,ShowdownHelper/Saffron,KewlStatics/Alliance,AustinXII/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,DesoGit/Tsunami_PS,DesoGit/TsunamiPS,AWailOfATail/Pokemon-Showdown,CreaturePhil/Showdown-Boilerplate,urkerab/Pokemon-Showdown,DesoGit/Tsunami_PS,DesoGit/TsunamiPS,Enigami/Pokemon-Showdown,Lord-Haji/SpacialGaze,HoeenCoder/SpacialGaze,EienSeiryuu/Pokemon-Showdown,panpawn/Pokemon-Showdown,jd4564/Pokemon-Showdown,AustinXII/Pokemon-Showdown,Enigami/Pokemon-Showdown,ZestOfLife/FestiveLife,Pikachuun/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,xfix/Pokemon-Showdown,Bryan-0/Pokemon-Showdown,PS-Spectral/Spectral,Mystifi/Exiled,Sora-League/Sora,zek7rom/SpacialGaze,PS-Spectral/Spectral,KewlStatics/Alliance,Kokonoe-san/Glacia-PS,TbirdClanWish/Pokemon-Showdown,HoeenCoder/SpacialGaze,ZestOfLife/FestiveLife,panpawn/Gold-Server,panpawn/Gold-Server,xCrystal/Pokemon-Showdown,svivian/Pokemon-Showdown,svivian/Pokemon-Showdown,svivian/Pokemon-Showdown,jumbowhales/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,xfix/Pokemon-Showdown,aakashrajput/Pokemon-Showdown,Zarel/Pokemon-Showdown,DarkSuicune/Pokemon-Showdown,QuiteQuiet/Pokemon-Showdown,KewlStatics/Shit,Enigami/Pokemon-Showdown,AnaRitaTorres/Pokemon-Showdown,AWailOfATail/Pokemon-Showdown,Flareninja/Showdown-Boilerplate,urkerab/Pokemon-Showdown,Lord-Haji/SpacialGaze,sirDonovan/Pokemon-Showdown,Volcos/SpacialGaze,CharizardtheFireMage/Showdown-Boilerplate,SolarisFox/Pokemon-Showdown,Elveman/RPCShowdownServer,Sora-League/Sora,Sora-League/Sora,azum4roll/Pokemon-Showdown,panpawn/Gold-Server,KewlStatics/Shit