Support AWS NLB routable QUIC connection IDs

[vholer]

There is a new QUIC support in the AWS Network Load Balancer, which might be used on top of (HAProxy) Kubernetes Ingress. The approach is that AWS NLB controller configures to each pod unique AWS_LBC_QUIC_SERVER_ID env. variable, which should be used to derive the QUIC connection ID. (But, I have to say that I haven't found if the server ID in HAProxy is configurable at all.)

Announcement:
https://aws.amazon.com/blogs/networking-and-content-delivery/introducing-quic-protocol-support-for-network-load-balancer-accelerating-mobile-first-applications/

Example using Envoy proxy (interesting are the steps with namespace labeling and service and pod annotations):
https://kubernetes-sigs.github.io/aws-load-balancer-controller/latest/guide/use_cases/quic/