Add option to restrict wearable clothes

See #1560

Note: Already wearing check is not needed in player_humanityMorph
because it is already done in player_wearClothes. See:

0726311df5

SQF/dayz_code/compile/player_humanityMorph.sqf

@@ -3,8 +3,6 @@ _playerUID 	= _this select 0;
 _charID 	= _this select 1;
 _model 		= _this select 2;
 
-if (typeOF player == _model) exitWith {cutText ['You already wear this Skin!', 'PLAIN'];};
-
 _old = player;
 player allowDamage false;