Document/cleanup legacy thatch support

Eventually these XXX-marked items should be removed once the
official release has supported the newer features for long enough.

README.md

@@ -23,6 +23,7 @@ All features from WintersKnight's original NodeCore Nature mod, plus...
 		- Tall Grass -> Sedges
 		- Flowers (N.B. some colors were changed to maintain balance)
 		- Reeds -> Rushes (added dormant state)
+		- Thatch
 	- Recipe to grind vanilla dry flora into plant fibers
 	- Preserve mod flora consistent with vanilla mechanics
 - Moss Complete Overhaul

flora_mossy.lua

@@ -71,6 +71,7 @@ nodecore.register_mossy = register_mossy
 
 register_mossy("cobble", "nc_terrain:cobble")
 register_mossy("stone", "nc_terrain:stone")
+-- XXX: LEGACY PRE-THATCH SUPPORT
 register_mossy("thatch", minetest.registered_nodes["nc_flora:thatch"]
 	and "nc_flora:thatch" or modname .. ":thatch")
 register_mossy("trunk", "nc_tree:tree")

item_thatch.lua

@@ -5,44 +5,49 @@ local include, minetest, nodecore
 
 local modname = minetest.get_current_modname()
 
-local floraswap = include("lib_floraswap")
-if minetest.registered_nodes["nc_flora:thatch"] then
-	return floraswap(modname .. ":thatch", "nc_flora:thatch")
-end
+-- ================================================================== --
+-- XXX: LEGACY PRE-THATCH SUPPORT
+if not minetest.registered_nodes["nc_flora:thatch"] then
+	minetest.register_node(modname .. ":thatch", {
+			description = "Thatch",
+			tiles = {modname .. "_thatch.png"},
+			groups = {
+				choppy = 2,
+				flammable = 2,
+				fire_fuel = 5
+			},
+			sounds = nodecore.sounds("nc_terrain_swishy")
+		})
 
-minetest.register_node(modname .. ":thatch", {
-		description = "Thatch",
-		tiles = {modname .. "_thatch.png"},
-		groups = {
-			choppy = 2,
-			flammable = 2,
-			fire_fuel = 5
-		},
-		sounds = nodecore.sounds("nc_terrain_swishy")
-	})
+	nodecore.register_craft({
+			label = "weave plant fibers into thatch",
+			action = "pummel",
+			toolgroups = {thumpy = 1},
+			duration = 3,
+			nodes = {
+				{
+					match = {name = modname .. ":plant_fibers", count = 8},
+					replace = modname .. ":thatch"
+				}
+			},
+		})
 
-nodecore.register_craft({
-		label = "weave plant fibers into thatch",
-		action = "pummel",
-		toolgroups = {thumpy = 1},
-		duration = 3,
-		nodes = {
-			{
-				match = {name = modname .. ":plant_fibers", count = 8},
-				replace = modname .. ":thatch"
+	nodecore.register_craft({
+			label = "break thatch into fibers",
+			action = "pummel",
+			priority = -1,
+			toolgroups = {choppy = 2},
+			nodes = {
+				{match = modname .. ":thatch", replace = "air"}
+			},
+			items = {
+				{name = modname .. ":plant_fibers 2", count = 4, scatter = 3}
 			}
-		},
-	})
+		})
 
-nodecore.register_craft({
-		label = "break thatch into fibers",
-		action = "pummel",
-		priority = -1,
-		toolgroups = {choppy = 2},
-		nodes = {
-			{match = modname .. ":thatch", replace = "air"}
-		},
-		items = {
-			{name = modname .. ":plant_fibers 2", count = 4, scatter = 3}
-		}
-	})
+	return
+end
+-- ================================================================== --
+
+local floraswap = include("lib_floraswap")
+floraswap(modname .. ":thatch", "nc_flora:thatch")