Lower snow footstep and dig sound level.

These sounds were perceived to be too loud in the
game. I've lowered them significantly but they remain
plenty audible. The dig sounds were very loud as well
so I toned them down as well.

mods/default/nodes.lua

@@ -324,11 +324,10 @@ minetest.register_node("default:dirt_with_snow", {
 	groups = {crumbly = 3, soil = 1},
 	drop = 'default:dirt',
 	sounds = default.node_sound_dirt_defaults({
-		footstep = {name = "default_snow_footstep", gain = 0.25},
+		footstep = {name = "default_snow_footstep", gain = 0.15},
 	}),
 })
 
-
 minetest.register_node("default:sand", {
 	description = "Sand",
 	tiles = {"default_sand.png"},
@@ -380,8 +379,9 @@ minetest.register_node("default:snow", {
 	},
 	groups = {crumbly = 3, falling_node = 1, puts_out_fire = 1},
 	sounds = default.node_sound_dirt_defaults({
-		footstep = {name = "default_snow_footstep", gain = 0.25},
-		dug = {name = "default_snow_footstep", gain = 0.75},
+		footstep = {name = "default_snow_footstep", gain = 0.15},
+		dug = {name = "default_snow_footstep", gain = 0.2},
+		dig = {name = "default_snow_footstep", gain = 0.2}
 	}),
 
 	on_construct = function(pos)
@@ -397,12 +397,12 @@ minetest.register_node("default:snowblock", {
 	tiles = {"default_snow.png"},
 	groups = {crumbly = 3, puts_out_fire = 1},
 	sounds = default.node_sound_dirt_defaults({
-		footstep = {name = "default_snow_footstep", gain = 0.25},
-		dug = {name = "default_snow_footstep", gain = 0.75},
+		footstep = {name = "default_snow_footstep", gain = 0.15},
+		dug = {name = "default_snow_footstep", gain = 0.2},
+		dig = {name = "default_snow_footstep", gain = 0.2}
 	}),
 })
 
-
 minetest.register_node("default:ice", {
 	description = "Ice",
 	tiles = {"default_ice.png"},