join_ratelimit: Account for auth from mods other than builtin (#11)

* join_ratelimit: Account for auth from mods other than builtin

* Fix luacheck warnings

.luacheckrc

@@ -11,6 +11,7 @@ read_globals = {
 	"vector", "ItemStack",
 	"dump", "screwdriver",
 	"minetest",
+	"core",
 
 	-- mods
 	"beerchat"

join_ratelimit.lua

@@ -2,16 +2,20 @@
 -- mitigates https://github.com/minetest/minetest/issues/11877 and https://github.com/minetest/minetest/issues/9498
 
 local ratelimit = {}
+local after = minetest.after
+local LIMIT = 1
 
 local function remove_entry(ip)
-    ratelimit[ip] = nil
+	ratelimit[ip] = nil
 end
 
-table.insert(minetest.registered_on_prejoinplayers, 1, function(_, ip)
-    if ratelimit[ip] then
-        return "You are joining too fast, please try again"
-    else
-        ratelimit[ip] = true
-        minetest.after(1, remove_entry, ip)
-    end
+minetest.register_on_mods_loaded(function()
+	table.insert(core.registered_on_prejoinplayers, 1, function(_, ip)
+		if ratelimit[ip] then
+			return "You are joining too fast, please try again"
+		else
+			ratelimit[ip] = true
+			after(LIMIT, remove_entry, ip)
+		end
+	end)
 end)