Make trash configurable but preserve default functionality

bags.lua

@@ -51,8 +51,11 @@ for i = 1, 4 do
 			elseif slots == 24 then
 				formspec = formspec.."background[0.06,0.99;7.92,7.52;ui_bags_lg_form.png]"
 			end
-			formspec = (formspec.."background[6.06,0;0.92,0.92;ui_bags_trash.png]"
-					.."list[detached:trash;main;6,0.1;1,1;]")
+			local player_name = player:get_player_name() -- For if statement.
+			if unified_inventory.trash_enabled or unified_inventory.is_creative(player_name) or minetest.get_player_privs(player_name).give then
+				formspec = (formspec.."background[6.06,0;0.92,0.92;ui_bags_trash.png]"
+						.."list[detached:trash;main;6,0.1;1,1;]")
+			end
 			return {formspec=formspec}
 		end,
 	})

init.lua

@@ -45,6 +45,9 @@ unified_inventory = {
 
 	-- "Lite" mode
 	lite_mode = minetest.setting_getbool("unified_inventory_lite"),
+	
+	-- Trash enabled
+	trash_enabled = (minetest.setting_getbool("unified_inventory_trash") ~= false),
 
 	pagecols = 8,
 	pagerows = 10,

register.lua

@@ -175,8 +175,11 @@ unified_inventory.register_page("craft", {
 		formspec = formspec.."listcolors[#00000000;#00000000]"
 		formspec = formspec.."list[current_player;craftpreview;6,"..formspecy..";1,1;]"
 		formspec = formspec.."list[current_player;craft;2,"..formspecy..";3,3;]"
-		formspec = formspec.."label[7,"..(formspecy + 1.5)..";" .. F("Trash:") .. "]"
-		formspec = formspec.."list[detached:trash;main;7,"..(formspecy + 2)..";1,1;]"
+		if unified_inventory.trash_enabled or unified_inventory.is_creative(player_name) or minetest.get_player_privs(player_name).give then
+			formspec = formspec.."label[7,"..(formspecy + 1.5)..";" .. F("Trash:") .. "]"
+			formspec = formspec.."background[7,"..(formspecy + 2)..";1,1;ui_single_slot.png]"
+			formspec = formspec.."list[detached:trash;main;7,"..(formspecy + 2)..";1,1;]"
+		end
 		formspec = formspec.."listring[current_name;craft]"
 		formspec = formspec.."listring[current_player;main]"
 		if unified_inventory.is_creative(player_name) then

settingtypes.txt

@@ -5,3 +5,7 @@ unified_inventory_lite (Lite mode) bool false
 #If enabled, bags will be made available which can be used to extend
 #inventory storage size.
 unified_inventory_bags (Enable bags) bool true
+
+#If enabled, the trash slot can be used by those without both creative
+#and the give privilege.
+unified_inventory_trash (Enable trash) bool true