Greatly optimize safe gear handling

- Safe inventory arrays are no longer sent over network to all machines
on server startup and on each lock/unlock
- Disabled user input then closed gear dialog during safe
lock/unlock/pack to block various duping methods.
- Moved safe creation, deletion and gear handling to server. This cuts
down on add[Magazine/Weapon/Backpack]Cargo, createVehicle and
deleteVehicle BE logs.

SQF/dayz_code/compile/fn_waitForObject.sqf

@@ -1,3 +1,14 @@
+/*
+	1. Waits for an object to be created and then reveals it to the player.
+	2. Optionally deletes a temporary sign or marker placeholder object.
+	
+	Parameters: 
+	_this select 0: string - object class name to reveal
+	_this select 1: object - sign object or ObjNull if none
+
+	["objectClassName", objNull] spawn fn_waitForObject;
+*/
+
 private ["_object","_sign"];
 
 _object = _this select 0;
@@ -8,5 +19,8 @@ waitUntil {
 	!isNull (nearestObject [player,_object])
 };
 
-deleteVehicle _sign;
+if (!isNull _sign) then {
+	deleteVehicle _sign;
+};
+
 player reveal (nearestObject [player,_object]);