Kubernetes 1.18 ingress class changes

[szuecs]

https://kubernetes.io/blog/2020/04/02/improvements-to-the-ingress-api-in-kubernetes-1.18/
Path types are now in spec that we already support via annotations, so they followed my comments. (Yeah)

Host header match (globbing)with wildcards to the next dot.

Ingress class:
Ingress class Resource supports default ingress class.
https://twitter.com/learnk8s/status/1247439078154330113?s=21
Ingress graduates to V1. The /ingress.class annotation has been replaced with the ingressClassName field and the IngressClass resource (beta)

[szuecs]

Because a discussion happened at the duplicate #1478, I will close this one