Fixed a console error that could occur when changing worlds during PVP.
Added MinHeadMovement to config for Position, for better configuration.
TimeInTheAir default increased to 12 to avoid rare dragbacks from Flight.
Fixed another console error related to changing worlds...
Fixed a bug with the Flight check where players would be dragged into the void if they sneaked off the edge of a block with void underneath it, and the Jesus-blocking part of the Flight check is enabled.
Fixed a bug where players dragged back for Jesus could be dragged back into blocks (if the water was only 1 block deep), sometimes causing them to be stuck.
Fixed a bug where sneaking on the side of some almost-solids (e.g. stacked anvils) could cause drag backs.
Added a new Jump check! The check is designed to block impossible jumps (for example jumping 5 blocks away). The calculations for this check were a lot harder than I expected. Slowness potions are not taken into account, and the Jump check will not check players who have Jump or Speed potions. It will eventually, however implementing those things requires me to do the same calculations again.
The Jump check is 100% accurate up to 15 blocks below, from which point it then approximates the distance using some simple maths, which are again pretty accurate but don't have the same 1-block precision. And of course, the further the player falls the less precise it will be. So for example if a player falls 100 blocks, they could perhaps, using hacks, land 3 blocks further than they could with a legitimate client.
The Jump check doesn't check Speed or Jump potions yet simply because I need to do more calculations for that, and that takes time. The next update for Jump will hopefully include support for Jump and Speed potions.
