Add support for armor layer

mods/default/player.lua

@@ -17,7 +17,7 @@ end
 -- Default player appearance
 default.player_register_model("character.b3d", {
 	animation_speed = 30,
-	textures = {"character.png", },
+	textures = {"character.png", "default_armor_blank.png", "16x_blank.png"},
 	animations = {
 		-- Standard animations.
 		stand     = { x=  0, y= 79, },
@@ -54,26 +54,43 @@ function default.player_set_model(player, model_name)
 		if player_model[name] == model_name then
 			return
 		end
+		player_textures[name] = player_textures[name] or model.textures
 		player:set_properties({
 			mesh = model_name,
-			textures = player_textures[name] or model.textures,
+			textures = player_textures[name],
 			visual = "mesh",
 			visual_size = model.visual_size or {x = 1, y =1},
 		})
 		default.player_set_animation(player, "stand")
 	else
 		player:set_properties({
-			textures = { "player.png", "player_back.png", },
+			textures = {"player.png", "player_back.png"},
 			visual = "upright_sprite",
 		})
 	end
 	player_model[name] = model_name
 end
 
+function default.player_set_armor(player, texture)
+	local name = player:get_player_name()
+	player_textures[name][2] = texture
+	player:set_properties({textures = player_textures[name]})
+end
+
+function default.player_set_skin(player, texture)
+	local name = player:get_player_name()
+	player_textures[name][1] = texture
+	player:set_properties({textures = player_textures[name]})
+end
+
 function default.player_set_textures(player, textures)
 	local name = player:get_player_name()
+	if textures[2] == nil or textures[3] == nil then
+		textures = {textures[1], "default_armor_blank.png", "16x_blank.png"}
+		minetest.log("error", "Deprecated use of 'default.player_set_textures()'. Use 'default.player_set_skin()' instead.")
+	end
 	player_textures[name] = textures
-	player:set_properties({textures = textures,})
+	player:set_properties({textures = textures})
 end
 
 function default.player_set_animation(player, anim_name, speed)