Adding basic pve support

Around 50% of all servers are pve servers. This commit adds a basic support and prevent the player vs. player damage. Also if pve is enabled and DZE_BackpackAntiTheft too, the backpack anti theft is active for the whole server.

SQF/dayz_code/configVariables.sqf

@@ -35,6 +35,7 @@ DZE_NutritionDivisor = [1, 1, 1, 1]; //array of DIVISORS that regulate the rate
 DZE_ZombieSpeed = [0,0]; //Default agro speed is 6 per zombie config, set array elements 0 and 1 the same for non-variable speed, set to 0 to disable. array format = [min, max];  Ex: [2, 6]; results in a range of speed between 2 and 6 (2 is the old DZE_slowZombies hard-coded speed)
 DZE_lockablesHarderPenalty = true; // Enforce an exponential wait on attempts between unlocking a safe/lockbox from a failed code.
 DZE_Hide_Body = true; //Enable hide dead bodies. Hiding a dead body removes the corpse marker from the map too. Default = true
+DZE_PVE_Mode = false; //Disable the PvP damage on the server. If DZE_BackpackAntiTheft = true, the backpack anti theft is active on the whle server. This is just a basic support for PVE Servers. Default = false
 
 // SafeZone
 DZE_SafeZoneZombieLoot = false;  // Enable spawning of Zombies and loot in positions listed in DZE_SafeZonePosArray?