Farming: Add negative fall_damage_add_percent to straw

This doubles the fall height without damage to 11 nodes.

mods/farming/nodes.lua

@@ -89,7 +89,7 @@ minetest.register_node("farming:straw", {
 	description = "Straw",
 	tiles = {"farming_straw.png"},
 	is_ground_content = false,
-	groups = {snappy=3, flammable=4},
+	groups = {snappy=3, flammable=4, fall_damage_add_percent=-30},
 	sounds = default.node_sound_leaves_defaults(),
 })