Misc improvements to landmines/reinforced cobble

Author: LoneWolfHT

mods/ctf/ctf_landmine/init.lua

@@ -137,6 +137,8 @@ core.register_node("ctf_landmine:landmine", {
 
 		meta:set_string("placer", name)
 		meta:set_string("pteam", pteam)
+		meta:mark_as_private({"placer", "pteam"})
+
 		add_landmine(pos)
 	end,
 	on_punch = function(pos, _node, puncher, pointed_thing)

mods/ctf/ctf_map/ctf_traps.lua

@@ -173,6 +173,7 @@ minetest.register_node("ctf_map:damage_cobble", {
 	after_place_node = function(pos, placer, itemstack, pointed_thing)
 		local meta = minetest.get_meta(pos)
 		meta:set_string("placer", placer:get_player_name())
+		meta:mark_as_private("placer")
 	end
 })
 
@@ -187,14 +188,13 @@ minetest.register_node("ctf_map:reinforced_cobble", {
 		local placer_team = meta:get_string("placer_team")
 		local digger_team = ctf_teams.get(digger)
 		if placer_team ~= digger_team then
-			minetest.set_node(pos, {name = "ctf_map:reinforced_cobble_hardened"})
-			meta = minetest.get_meta(pos)
-			meta:set_string("placer_team", placer_team)
+			minetest.swap_node(pos, {name = "ctf_map:reinforced_cobble_hardened"})
 		end
 	end,
 	after_place_node = function(pos, placer, itemstack, pointed_thing)
 		local meta = minetest.get_meta(pos)
 		meta:set_string("placer_team", ctf_teams.get(placer))
+		meta:mark_as_private("placer_team")
 	end,
 	on_dig = function(pos, node, digger)
 		local meta = minetest.get_meta(pos)
@@ -215,9 +215,7 @@ minetest.register_node("ctf_map:reinforced_cobble_hardened", {
 		local placer_team = meta:get_string("placer_team")
 		local digger_team = ctf_teams.get(digger)
 		if placer_team == digger_team then
-			minetest.set_node(pos, {name = "ctf_map:reinforced_cobble"})
-			meta = minetest.get_meta(pos)
-			meta:set_string("placer_team", placer_team)
+			minetest.swap_node(pos, {name = "ctf_map:reinforced_cobble"})
 		end
 	end,
 	on_dig = function(pos, node, digger)