Simplify leafdecay stuff, add leafdecay factoid

mods/HELP/mcl_doc/init.lua

@@ -46,6 +46,18 @@ doc.sub.items.register_factoid("nodes", "groups", function(itemstring, def)
 	return datastring
 end)
 
+doc.sub.items.register_factoid("nodes", "groups", function(itemstring, def)
+	local formstring = ""
+	if def.groups.leafdecay ~= nil then
+		if def.drop ~= "" and def.drop ~= nil and def.drop ~= itemstring then
+			formstring = string.format("This block quickly decays when there is no wood block of any species within a distance of %d. When decaying, it disappears and may drop one of its regular drops. The block does not decay when the block has been placed by a player.", def.groups.leafdecay)
+		else
+			formstring = string.format("This block quickly decays and disappears when there is no wood block of any species within a distance of %d. The block does not decay when the block has been placed by a player.", def.groups.leafdecay)
+		end
+	end
+	return formstring
+end)
+
 -- nodes which have flower placement rules
 doc.sub.items.register_factoid("nodes", "groups", function(itemstring, def)
 	local datastring = ""

mods/ITEMS/mcl_core/functions.lua

@@ -930,8 +930,6 @@ end
 -- If param2 of the node is ~= 0, the node will always be preserved. Thus, if
 -- the player places a node of that kind, you will want to set param2=1 or so.
 --
--- If the node is in the leafdecay_drop group then the it will always be dropped
--- as an item
 
 mcl_core.leafdecay_trunk_cache = {}
 mcl_core.leafdecay_enable_cache = true
@@ -997,8 +995,6 @@ minetest.register_abm({
 			-- Drop stuff other than the node itself
 			local itemstacks = minetest.get_node_drops(n0.name)
 			for _, itemname in ipairs(itemstacks) do
-				if minetest.get_item_group(n0.name, "leafdecay_drop") ~= 0 or
-						itemname ~= n0.name then
 				local p_drop = {
 					x = p0.x - 0.5 + math.random(),
 					y = p0.y - 0.5 + math.random(),
@@ -1006,7 +1002,6 @@ minetest.register_abm({
 				}
 				minetest.add_item(p_drop, itemname)
 			end
-			end
 			-- Remove node
 			minetest.remove_node(p0)
 			core.check_for_falling(p0)