Fixes for tls, grafana variable syntax, victoriametrics and the check_nwc_health-interface.php template

[jstark1]

This patch skips TLS checks to the database, to prevent this error:

[jstark1]

The patches should fix ConSol-Monitoring/omd#206

[sni]

could you explain your changes a little bit?

[jstark1]

Sure,

1. PHP default checks the TLS Certificates. If we use InfluxDB or Victoriametrics in SSL mode, Histou fails with the TLS error above. One option is to use valid Certificates and correct Hostnames/IPs and give PHP and Grafana a truststore to check the validity. In my Change, we simply bypass the certificate checks, like the Grafana datasources.
2. If we use Grafana dashboards with dynamic variables, like the check_nwc_health-interface.php template, we need to bypass the default Grafana template quoting, to use values correct values in the graph lookups with the new template ${var:raw}
3. The InfluxDB Dashboard works now, in the third commit I checked the same check_nwc_health-interface.php dashboard with Victoriametrics. I don't know if and how it worked before, so I replaced the label lookup (https://docs.victoriametrics.com/url-examples/#apiv1labels)
4. The last 3 commits are GUI polish and a logic error in the check_nwc_health-interface.php template

The Pull Request sni/Thruk#1404 are also on the GUI side the hide the new grafana variable syntax

I hop this helps