New translations irc.lang.json (English, Australia)

languages/en-AU-irc.lang.json

   "Core Developers:": "Good cobbers:",
   "Erroneous nickname": "Bad nickname, mate. Bad nickname",
   "Help not found": "Sorry mate, no help for that",
-  "JOIN 0 is not allowed": "Can't run JOIN 0 here, mate",
   "Not enough parameters": "Mate, are you all together? That message needs more params",
   "Unknown command": "Sorry mate, I dunno that command",
   "Unknown subcommand": "Sorry mate, I dunno that subcommand",