LookupGatewayProxy finds the gateway service registered with the local agent.

LookupServiceForSidecar finds candidate local proxy registrations that are a sidecar for the given service.

NewRegisterMonitor initializes a RegisterMonitor.

RegisterReconcilePeriod is how often the monitor will attempt to reconcile the expected service state with the remote Consul server.

RegisterTTLPeriod is the TTL setting for the health check of the service.

RegisterMonitor registers the proxy with the local Consul agent with a TTL health check that is kept alive.

FlagUpstreams implements the flag.Value interface and allows specifying the -upstream flag multiple times and keeping track of the name of the upstream and the local port.