Bugfixes:
1) Fixed an issue with offhand overstacked items and the overstack permission that would remove overstacked items in the offhand.

2) Fixed the RNG exploit code to properly toggle off if disabled.

3) Fixed an issue with the InvalidPotion detection that would remove renamed water bottles erroneously

New Features:
1) Now protects against a lag exploit that involves swapping offhand items very quickly causing clients to lag out / disconnect.
https://github.com/dniym/IllegalStack/wiki/PreventPreventItemSwapLagExploit