Bukkit

1.0.0 : Potion Lvl 2 : Desabled
          Potion Regen Lvl1/2 : Desabled
1.0.1 : /Potion on : Enabled Potion
          /Potion off : Desabled Potion
1.0.2 : Message player : You can not do this (if /Potion off)
1.0.3 : To avoid incompatibilities /Potion become /Pot
          /Pot on & /Pot off