Use application/cbor-seq media type in streaming CBOR responses.

The media type application/cbor describes exactly one encoded item. As a new (to Kubernetes) format
with no existing clients, streaming/watch responses will use the application/cbor-seq media
type. CBOR watch responses conform to the specification of CBOR Sequences and are encoded as the
concatenation of zero or more items with no additional framing.

Kubernetes-commit: 504f14998e920ca8837b3310094b3da11c62a070

Author: benluddy

pkg/runtime/types.go

@@ -43,10 +43,11 @@ type TypeMeta struct {
 }
 
 const (
-	ContentTypeJSON     string = "application/json"
-	ContentTypeYAML     string = "application/yaml"
-	ContentTypeProtobuf string = "application/vnd.kubernetes.protobuf"
-	ContentTypeCBOR     string = "application/cbor"
+	ContentTypeJSON         string = "application/json"
+	ContentTypeYAML         string = "application/yaml"
+	ContentTypeProtobuf     string = "application/vnd.kubernetes.protobuf"
+	ContentTypeCBOR         string = "application/cbor"     // RFC 8949
+	ContentTypeCBORSequence string = "application/cbor-seq" // RFC 8742
 )
 
 // RawExtension is used to hold extensions in external versions.