Checkmk Werk 11756: Fix errors after form submissions when using web server authentication

ID: 11756 Title: Fix errors after form submissions when using web server authentication Component: Multisite Level: 2 Class: Bug fix Version: 2.1.0i1 When using the web server level authentication (Basic, digest, kerberos, ...), several form submissions raised an error like this: "AttributeError ('NoneType' object has no attribute 'session_info')". This was caused by an incomplete session initialization when using this kind of authentication.