Modifications on wool:white's recipe

- You need, from now on, 9 farming:strings to craft a wool:white. Before,
  you needed 4 strings, and the wool:white gave you 9 strings, which is a
  problem. The solution is : 9 to craft the wool, which gives 9.

mods/farming/cotton.lua

@@ -39,8 +39,9 @@ minetest.register_alias("farming:string", "farming:cotton")
 minetest.register_craft({
 	output = "wool:white",
 	recipe = {
-		{"farming:string", "farming:string"},
-		{"farming:string", "farming:string"},
+		{"farming:string", "farming:string", "farming:string"},
+		{"farming:string", "farming:string", "farming:string"},
+		{"farming:string", "farming:string", "farming:string"},
 	}
 })