Additional information for gateway/v1.AddressType

[cccsss01]

What would you like to be added:
For hostname, is wild card supported?
Add a dns example to gateway address

Why this is needed:
https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1.AddressType
https://gateway-api.sigs.k8s.io/reference/spec/#gateway.networking.k8s.io/v1.GatewayAddress

[youngnick]

No, wild card is not supported, because the intent of being able to set a hostname for Addresses is to support use cases like AWS load balancers, where the IP addresses rotate, and so the best way to connect to the listener is via a DNS name rather than an IP address.

In all cases, the Address is used as the place for clients to connect to, so having a wildcard DNS entry doesn't make any sense.

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[k8s-triage-robot]

The Kubernetes project currently lacks enough active contributors to adequately respond to all issues.

This bot triages un-triaged issues according to the following rules:

• After 90d of inactivity, lifecycle/stale is applied
• After 30d of inactivity since lifecycle/stale was applied, lifecycle/rotten is applied
• After 30d of inactivity since lifecycle/rotten was applied, the issue is closed

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• Mark this issue as fresh with /remove-lifecycle rotten
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/lifecycle rotten