make primordial gills climbable, make spore trees more likely to produce spawn

df_primordial_items/primordial_mushroom.lua

@@ -36,6 +36,7 @@ minetest.register_node("df_primordial_items:mushroom_gills", {
 	drawtype = "plantlike",
 	waving = 2,
 	walkable = false,
+	climbable = true,
 	is_ground_content = false,
 	sounds = df_primordial_items.sounds.leaves,
 	use_texture_alpha = true,

df_trees/spore_tree.lua

@@ -123,7 +123,7 @@ minetest.register_node("df_trees:spore_tree_fruiting_body", {
 		items = {
 			{
 				items = {'df_trees:spore_tree_sapling'},
-				rarity = 10,
+				rarity = 2,
 			},
 			{
 				items = {'df_trees:spore_tree_hyphae'},