Hack prevention stuff

[SpaceManiac]

kookster on IRC recommends this list of (somewhat vaguely worded) common hacks that could be mitigated by GS core:

• moving faster then you should be able too while running/walking/flying/riding a horse/boat/minecart
• flying when you dont have fly
• walking on water
• placing/breaking a block you arent looking at
• healing with item/beacon
• dealing damage when not facing a player
• instant turning
• using a effect that you do not have
• breaking blocks faster then you can click

[Fred302]

I will work on this

[gdude2002]

@Fred302 Did you end up doing anything with this?