[2.3.0] Checkmk Werk 16126 created: Ignore invalid session cookie for header-auth

Title: Ignore invalid session cookie for header-auth Class: fix Compatible: compat Component: wato Date: 1695106437 Edition: cre Knowledge: doc Level: 1 Version: 2.3.0b1 When an user logged in via HTTP header authentication (e.g. the legacy SAML method with mod_auth_mellon) and that user had a session cookie from a previous session which is now invalid the creation of a new session was aborted. This Werk fixes this so previous session cookies are ignored if they are invalid and a new session will be created.