Consul Ingress Listener protocols

[sigilion]

Proposal

I believe the protocol list here is no longer up to date, according to the consul docs the protocol can also be "grpc" or "http2"

Use-cases

Ingress gateways for grpc and http2 connections

[lgfa29]

Thanks for the report @sigilion. I've opened a PR to update the list of valid protocols.

[github-actions]

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