Checkmk Werk 12083: OverflowError on bad varnishstats uptime value

ID: 12083 Title: OverflowError on bad varnishstats uptime value Component: Checks & agents Level: 1 Class: Bug fix Version: 2.1.0i1 {{varnishstats}} might generate bad values for uptime, e.g. 18446744073709545410. This change catches the error and provides the user with a hint to {{varnishstats}}.