Bukkit/CraftBukkit — pull request #1326 by Toemme (2014-01-26 03:23:58+00:00)
Title: Changed default TeleportCause from PLUGIN to UNKNOWN

There are two methods for teleporting Entities. One is supplied with a TeleportCause and one is not. When calling the one without the TeleportCause parameter, TeleportCause.PLUGIN is used. However, TeleportCause.UNKNOWN seems to be a more consistent choice.