JakobOvrum/LuaIRC — pull request #28 by mindless2112 (2014-08-02 19:17:58+00:00)
Title: Add handlers for errors 436 ERR_NICKCOLLISION and 437 ERR_UNAVAILRESOURCE.

At least for 437, the server closes your connection if you are in the process of connecting and do not supply another nickname.