Downloaded the files and did a quick check for backdoors (methlab,yeastbeast,fruitslicer,growop,oilrush,pizzamaker and trashman) i have not found any backdoors YET!
I am back again with new information, opened the server with those addons and found a backdoor on the pizzamaker one
the backdoor is located at Lua/autorun/zpizmak_load.lua Line 3 guy did a spacebar trick to try hide the backdoor code