Packet3Chat Synchronization Bugs

There exists synchronization issues with the handling of Packet3Chat on the server side. The issues come into play when the player is kicked because of a chat message. Such as sending one to long or one with illegal characters. This attempts to disconnect the player and remove him from the world while on a different thread than the main server thread. This can result in some inconsistencies with the server state or even full server crashes such as the one in the attached crash report.