New config variable dayz_toolBreaking

Tool breaking is disabled by default.

Also made all scripts use Epoch sledge, which is a different model from
vanilla sledge.

PK_DZ was a duplicate of the new PKM_DZ.

SQF/dayz_code/Configs/CfgWeapons/Tools/Sledgehammer.hpp

@@ -30,7 +30,7 @@ class ItemSledge: ItemCore // Epoch class
 		*/
 	};
 };
-
+/* //Vanilla sledge is using a different model
 class ItemSledgeHammer : ItemCore
 {
 	scope = public;
@@ -60,4 +60,5 @@ class ItemSledgeHammerBroken : ItemCore
 			script = "spawn player_fixHatchet;";
 		};
 	};
-};
+};
+*/