Change steel ladder sounds + fix/add missing recipes

mods/default/crafting.lua

@@ -766,7 +766,31 @@ minetest.register_craft({
 
 minetest.register_craft({
 	type = "fuel",
-	recipe = "default:ladder",
+	recipe = "default:fence_acacia_wood",
+	burntime = 15,
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "default:fence_junglewood",
+	burntime = 15,
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "default:fence_pine_wood",
+	burntime = 15,
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "default:fence_aspen_wood",
+	burntime = 15,
+})
+
+minetest.register_craft({
+	type = "fuel",
+	recipe = "default:ladder_wood",
 	burntime = 5,
 })
 
@@ -790,7 +814,7 @@ minetest.register_craft({
 
 minetest.register_craft({
 	type = "fuel",
-	recipe = "default:sign_wall",
+	recipe = "default:sign_wall_wood",
 	burntime = 10,
 })