Fix weather sky color issues

But also disable void blackness

mods/ENVIRONMENT/lightning/init.lua

@@ -25,19 +25,16 @@ local rng = PcgRandom(32321123312123)
 local ps = {}
 local ttl = 1
 
-local revertsky = function()
+local revertsky = function(dtime)
 	if ttl == 0 then
 		return
 	end
-	ttl = ttl - 1
+	ttl = ttl - dtime
 	if ttl > 0 then
 		return
 	end
 
-	for key, entry in pairs(ps) do
-		local sky = entry.sky
-		entry.p:set_sky(sky.bgcolor, sky.type, sky.textures)
-	end
+	skycolor.remove_layer("lightning")
 
 	ps = {}
 end
@@ -139,7 +136,8 @@ lightning.strike = function(pos)
 		local name = player:get_player_name()
 		if ps[name] == nil then
 			ps[name] = {p = player, sky = sky}
-			player:set_sky(0xffffff, "plain", {})
+			skycolor.add_layer("lightning", {{r=255,g=255,b=255}})
+			skycolor.active = true
 		end
 	end
 

mods/PLAYER/playerplus/init.lua

@@ -122,12 +122,15 @@ minetest.register_globalstep(function(dtime)
 		end
 
 		-- Apply black sky in the Void and deal Void damage
+		--[[ DISABLED because of conflicts with weater_pack.
+		TODO: The sky color handling needs a major rework.
 		if pos.y < mcl_vars.bedrock_overworld_max then
 			-- Player reached the void, set black sky box
 			player:set_sky("#000000", "plain")
 		else
 			player:set_sky(nil, "regular")
 		end
+		]]
 		if pos.y < mcl_vars.bedrock_overworld_min - 65 then
 			-- Player is deep into the void, deal void damage
 			if player:get_hp() > 0 then