Checkmk Werk 14685: Fixed real-time checks with encryption

ID: 14685 Title: Fixed real-time checks with encryption Component: cmc Level: 2 Class: Bug fix Version: 2.2.0i1 Real-time check data which contains a 0-byte was not processed correctly, so this mainly affected encrypted RTC data. This has been fixed. Note that even normal check results were affected, but these are normally text-only without any 0-bytes, so they worked basically all the time.