Checkmk Werk 13647: Two-factor auth: Improve error handling of wrong protocol or address

ID: 13647 Title: Two-factor auth: Improve error handling of wrong protocol or address Component: Multisite Level: 1 Class: Bug fix Version: 2.2.0i1 In case a user tries to register two-factor credentials without HTTPS, the error message was not very helpful. And also the handling access via IP address instead of a valid host- or DNS name is improved. The new message is now more helpful and also does not raise a crash report anymore.