Add package update detection on Content tab (#13807)

src/script/lua_api/l_util.h

@@ -128,6 +128,9 @@ class ModApiUtil : public ModApiBase
 	// set_last_run_mod(modname)
 	static int l_set_last_run_mod(lua_State *L);
 
+	// urlencode(value)
+	static int l_urlencode(lua_State *L);
+
 public:
 	static void Initialize(lua_State *L, int top);
 	static void InitializeAsync(lua_State *L, int top);