Replace flag abm with node timer

ctf_flag/api.lua

@@ -152,6 +152,11 @@ function ctf_flag.update(pos)
 	end
 end
 
+function ctf_flag.flag_tick(pos)
+	ctf_flag.update(pos)
+	minetest.get_node_timer(pos):start(5)
+end
+
 -- get a flag from a team
 function ctf_flag.get(pos)
 	if not pos then

ctf_flag/flag_func.lua

@@ -179,6 +179,7 @@ ctf_flag = {
 	on_construct = function(pos)
 		local meta = minetest.get_meta(pos)
 		meta:set_string("infotext", "Unowned flag")
+		minetest.get_node_timer(pos):start(5)
 	end,
 	after_place_node = function(pos, placer)
 		local name = placer:get_player_name()

ctf_flag/flags.lua

@@ -23,7 +23,8 @@ minetest.register_node("ctf_flag:flag", {
 	on_punch = ctf_flag.on_punch,
 	on_rightclick = ctf_flag.on_rightclick,
 	on_construct = ctf_flag.on_construct,
-	after_place_node = ctf_flag.after_place_node
+	after_place_node = ctf_flag.after_place_node,
+	on_timer = ctf_flag.flag_tick
 })
 
 for color, _ in pairs(ctf.flag_colors) do
@@ -77,13 +78,6 @@ minetest.register_node("ctf_flag:flag_captured_top",{
 	on_rightclick = ctf_flag.on_rightclick_top
 })
 
-minetest.register_abm({
-	nodenames = {"group:flag_bottom"},
-	inteval = 5,
-	chance = 1,
-	action = ctf_flag.update
-})
-
 if ctf.setting("flag.crafting") then
 	minetest.register_craft({
 	output = "ctf_flag:flag",