[PVE-User] Add InfluxDB HTTPS Allow Self Signed Certificate Checkbox And Cluster Tag

[Samuel Lorch]

Hello,

recently support for HTTP and HTTPS was added for use with InfluxDB as a 
External Metrics Server and it works really well with InfluxDB 2.0 . 
Sadly using HTTPS Requires a valid Certificate. Would it be possible to 
add a Checkbox to allow Self Signed Certificates for HTTPS Similar to 
Telegraf's "|insecure_skip_verify|" Setting?

Also it would be great if the Cluster name was added as a Tag "cluster" 
to all Metric data similarly to the "nodename" and "host" Tag for the 
Nodes, this would allow very easy monitoring of multiple Clusters 
without having to make a new bucket for each Cluster.

Thanks in advance,
Samuel