Checkmk Werk 14812: Properly handle marked units on utf-8 systems

ID: 14812 Title: Properly handle marked units on utf-8 systems Component: agents Level: 1 Class: Bug fix Version: 2.2.0i1 The systemd check used to miss failed units if the leading character is a UTF-8 character, i.e. ●,. Now we do not print leading characters when the agent runs and find all failed units. If any exist. This requires an agent update.