Add support for password reset

[teolemon]

Password reset
https://world.openfoodfacts.org/cgi/reset_password.pl

[teolemon]

<form method="post" action="/cgi/reset_password.pl" enctype="multipart/form-data">
            <label>
                Username or e-mail address: 
                <input type="text" name="userid_or_email">
            </label>
        
        <input type="hidden" name="action" value="process">
        <input type="hidden" name="type" value="send_email">
        <input type="submit" name=".submit" class="button">
    </form>```