v1.21.2: Minfilia Warde - Echo 2 -- Fixes a problem with nonstandard URLs and redirects -- This could allow an attacker to craft an Anubis pass-challenge URL that forces a redirect to nonstandard URLs, such as the `javascript:` scheme which executes arbitrary JavaScript code in a browser context when the user clicks the "Try again" button. This has been fixed by disallowing any URLs without the scheme `http` or `https`.