Using random interval for node timer, like in the on_generated timer …

…interval

init.lua

@@ -391,7 +391,7 @@ if moretrees.grow_legacy_saplings then
 		run_at_every_load = true,
 		action = function(pos)
 			minetest.log("info", "[moretrees] Starting growth timer for legacy ongen sapling at "..minetest.pos_to_string(pos, 0))
-			minetest.get_node_timer(pos):start(2)
+			minetest.get_node_timer(pos):start(math.random(2, 10))
 		end
 	})
 end