Added permission that allows for infinite stacking, if the stack size limit line in the config is set to true. This enables the server owner to limit infinite items to a stack size of their choice(example being 500), for players that don't have the permission.
Permission: infinityslots.unlimited
Note: Infinite stacking for everyone will continue on the server if the Stack_Size_Limit setting in the config is false.
Also added a random number tag to each infinite item so the items will not stack with each other allowing for item duplication.