Remove explicit naming of domain in setcookie

src/MD_STD.php

@@ -345,7 +345,6 @@ public static function get_user_lang(array $allowed_langs, string $default_lang)
         $cookie_options = [
             'expires' => self::strtotime("+1 month"),
             'path' => '/',
-            'domain' => $_SERVER['SERVER_NAME'],
             'secure' => true,
             'httponly' => true,
             'samesite' => 'Lax' // None || Lax  || Strict