add brass and steel chainlinks, recipe changes...

if glooptest is not installed, an alias is added to equate homedecor
steel chainlinks to glooptest's, for compatibility.

The six-steel-ingot wall chain recipe is no longer to make wall chains.
Instead, if glooptest is not installed, this recipe is used to make
chain *links*.

Whether glooptest is installed or not, the steel chainlinks are still
used along with steel ingots, to make wall chains as before.

homedecor/crafts.lua

@@ -108,6 +108,16 @@ minetest.register_craftitem("homedecor:steel_strip", {
 	inventory_image = "homedecor_steel_strip.png"
 })
 
+minetest.register_craftitem("homedecor:chainlink_steel", {
+	description = "Steel chainlink",
+	inventory_image = "homedecor_chainlink_steel.png"
+})
+
+minetest.register_craftitem("homedecor:chainlink_brass", {
+	description = "Brass chainlink",
+	inventory_image = "homedecor_chainlink_brass.png"
+})
+
 -- alternate crafting if mesecons is/isn't installed
 
 if not minetest.get_modpath("mesecons") then
@@ -2549,3 +2559,37 @@ minetest.register_craft( {
 			{ "vessels:glass_bottle", "dye:brown" }
         },
 })
+
+if not minetest.get_modpath("glooptest") then
+
+	minetest.register_alias("glooptest:chainlink", "homedecor:chainlink_steel")
+
+	minetest.register_craft({
+		output = "glooptest:chainlink 12",
+		recipe = {
+		    {"", "default:steel_ingot", "default:steel_ingot"},
+		    { "default:steel_ingot", "", "default:steel_ingot" },
+		    { "default:steel_ingot", "default:steel_ingot", "" },
+		},
+	})
+
+end
+
+minetest.register_craft({
+	output = "homedecor:chains 4",
+	recipe = {
+	    { "default:steel_ingot", "", "default:steel_ingot"},
+	    { "homedecor:chainlink_steel", "", "homedecor:chainlink_steel" },
+	    { "homedecor:chainlink_steel", "", "homedecor:chainlink_steel" },
+	},
+})
+
+minetest.register_craft({
+	output = "homedecor:chainlink_brass 12",
+	recipe = {
+	    {"", "technic:brass_ingot", "technic:brass_ingot"},
+	    { "technic:brass_ingot", "", "technic:brass_ingot" },
+	    { "technic:brass_ingot", "technic:brass_ingot", "" },
+	},
+})
+

homedecor/furniture_recipes.lua

@@ -219,24 +219,6 @@ minetest.register_craft({
     },
 })
 
-minetest.register_craft({
-    output = "homedecor:chains 4",
-    recipe = {
-        {"","default:steel_ingot","default:steel_ingot"},
-        { "default:steel_ingot","", "default:steel_ingot" },
-        { "default:steel_ingot", "default:steel_ingot", "" },
-    },
-})
-
-minetest.register_craft({
-    output = "homedecor:chains 4",
-    recipe = {
-        { "default:steel_ingot", "", "default:steel_ingot"},
-        { "glooptest:chainlink", "", "glooptest:chainlink" },
-        { "glooptest:chainlink", "", "glooptest:chainlink" },
-    },
-})
-
 minetest.register_craft({
     output = "homedecor:torch_wall 10",
     recipe = {