Contour External has ExternalName Services Support

In theory we don't need this since serving can handle returning an IP address via the KIngress

net-gateway-api/third_party/contour/gateway-external.yaml

Lines 38 to 39 in 0e92b90

    
           runtimeSettings: 
        
             enableExternalNameService: true

/assign

Note: If we set the IP address in KIngress Status then serving will use it properly

knative/serving#11843

https://github.com/knative/networking/blob/1d9a7cfb2ee119e581ba164fa1d152889efcf8a1/pkg/apis/networking/v1alpha1/ingress_types.go#L303

/unassign

oops, I meant to assign myself to this one: #665

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