[2.3.0] Checkmk Werk 16290 created: Limit login to single session: modify sessions lookup to enable the option

Title: Limit login to single session: modify sessions lookup to enable the option Class: fix Compatible: compat Component: wato Date: 1700659867 Edition: cre Level: 1 Version: 2.3.0b1 Prior to this werk, the user got logged out from the UI as soon as the global setting option 'Limit login to single session at a time' was enabled. This was due to the fact that the active sessions lookup returned an empty result which prevented any further notification. This werk fixes this behaviour and reinstates the behaviour of the 2.1 version.