[2.2.0] Checkmk Werk 16897 created: chrony: wrong handling of 'n/a' values for 'Ref time (UTC)' and 'Stratum'

Title: chrony: wrong handling of 'n/a' values for 'Ref time (UTC)' and 'Stratum' Class: fix Compatible: compat Component: checks Date: 1727263001 Edition: cre Level: 1 Version: 2.2.0p36 A chrony status without a valid server also contains invalid values for 'Stratum' and 'Ref time', resulting in a 'Time since last sync' of 54 years 256 days being reported (which is the difference to epoc := 1.1.1970). This change just skips reporting 'Stratum' and 'Time since last sync' if we don't have a valid server (address).