A player command to easily rename a warp, one that won't wipe the stats of that warp like a full delete would.
/warp rename oldName newName

Implementing this requires somewhat greater changes as the name is used (and stored) by the WarpManager. Changing the name of a Warp must go through the manager that holds this warp so it can be canceled if a warp with this name already exists.

While I want to implement this, I am currently not sure about the best way to do so.