[FEAT] Multiple connection points per cluster

[eriroley]

Description
would it be possible to allow multiple servers per cluster (so that during rolling upgrades we can still connect/manage the cluster)

currently:
When defining a cluster, a single URI/host must be defined (i.e. "https://elasticsearch1.fakedomain.com:9200")

desired state:
(a) during initial setup, enter a single URI/host, and it then finds/populates all possible hosts (repeat this on any connection in case new hosts are added)
(b) allow for multiple URIs per cluster, similar to the elastic config: discovery.seed_host (i.e. ["https://elasticsearch1.fakedomain.com:9200","https://elasticsearch2.fakedomain.com:9200"] )

[eriroley]

(For the record, I use the Chrome plugin - don't know if that matters)

[cars10]

Right now nothing stops you from manually saving multiple nodes of the same cluster :) I might look into this in the future.