Support multiple BGP upstream peer configuration

[goshlanguage]

As an end user, I have a need to support and configure multiple upstream BGP peers.

It looks as though work may had begun on this previous and was commented out, but I am not sure if that's right or not:
https://github.com/plunder-app/kube-vip/blob/master/cmd/kube-vip-config.go#L49-L58

Thank you for your help.

[thebsdbox]

If we use the Packet API, with --packet then it will automatically find all peers from the API. To specify this manually the --bgppeers flag has been added.

[thebsdbox]

^This will be closed when 0.2.3 is merged into main.