Add fixlight. Fix bucket of gold regression.

chat.lua

@@ -32,3 +32,31 @@ minetest.register_chatcommand("setspawn", {
 		minetest.chat_send_player(name, 'Your spawn position has been changed.')
 	end,
 })
+
+
+minetest.register_chatcommand("fixlight", {
+	params = "<radius>",
+	description = "attempt to fix light bugs",
+	privs = {},
+	func = function(name, param)
+		local privs = minetest.check_player_privs(name, {server=true})
+		if not privs then
+			return
+		end
+
+		print('Fun Caves: '..name..' used the fixlight command')
+		local player = minetest.get_player_by_name(name)
+		local pos = vector.round(player:getpos())
+		local radius = tonumber(param) or 50
+		radius = math.floor(radius)
+		local minp = vector.subtract(pos, radius)
+		local maxp = vector.add(pos, radius)
+
+		local vm = minetest.get_voxel_manip(minp, maxp)
+		--vm:set_lighting({day = 0, night = 0}, minp, maxp)
+		vm:calc_lighting(minp, maxp)
+		vm:update_liquids()
+		vm:write_to_map()
+		vm:update_map()
+	end,
+})