cmd_addrule

command: /addrule

quick ref:

/addrule class_name rule

description:

add a given game rule. 
@param class_name: "Player", "Block"
@param rule: rule name value pairs
Some examples rules: 
/addrule Block CanPlace Lever Glowstone
/addrule Block CanDestroy Glowstone true
/addrule Player AutoWalkupBlock false
/addrule Player CanJump true
/addrule Player PickingDist 5
/addrule Player CanJumpInAir true
/addrule Player CanFly true
/addrule Player CanJumpInWater true
/addrule Player JumpUpSpeed 5
/addrule Player AllowRunning false

添加一个指定的游戏规则