I upgraded from 1.5.6 to 2.1.0 and have noticed that the message when a player disconnects is not appearing in the server console anymore.
Is it possible to add this back again?

It was very handy because for example when a player times out, the server apparently does not log anything for some odd reason (you wouldn't even know this player was gone without looking at the connected players list), however, this plugin does log this and shows "Timed Out" as the reason.