This update fixes standing against a wall and boosting yourself to climb, something I thought I'd already prevented. It turns out this was still working against glass walls, which my playtest and demo server uses.

This kind of cheat should be fixed now.

The check that allowed it is modified to be less lenient, removing the loophole that allowed the wall climbing. However, being less lenient, players that are hovering in space by crouching over an edge and are next to non-solid blocks won't be able to boost themselves.

The check is now only only applied for players boosting themselves. For players boosting others the check is not applied, so players cannot camp in a position where boosting won't work on them.