* Add get/delete cluster, delete context to kubectl config ([#29821]...

  * Caveat: The alpha version no longer supports, and the beta version does not support, the "empty `podAffinityTerm.namespaces` list means all namespaces" behavior....

     * <code>smb1://server/</code>, or <code>smb1://server/share/</code> URLs
     * because workgroups, servers, and shares cannot be dynamically created
     * (although in the future it may be possible to create shares).
     *
     * @throws SmbException if an error occurs while creating the directory
     */
    public void mkdir() throws SmbException {

 *
 * <p>It is of course possible to use the methods of this class to check for invalid conditions
 * which are <i>not the caller's fault</i>. Doing so is <b>not recommended</b> because it is
 * misleading to future readers of the code and of stack traces. See <a
 * href="https://github.com/google/guava/wiki/ConditionalFailuresExplained">Conditional failures

	// doing below. However the changes that are needed here are a bit involved,
	// further discussion advised. Remove this comment and remove the worker model
	// for this function in future.
	maxWorkers := runtime.GOMAXPROCS(0) / 2
	ng := WithNPeersThrottled(len(sys.peerClients), maxWorkers)
	for idx, client := range sys.peerClients {
		if client == nil {
			continue
		}
		client := client

Additionally, since the information returned from the discovery APIs may change dynamically, a cache of the results should not be considered authoritative.
ETag support is planned in a future version to facilitate client caching.
([#47977](https://github.com/kubernetes/kubernetes/pull/47977), [#44957](https://github.com/kubernetes/kubernetes/pull/44957))

 - `kubeadm`: a separate "super-admin.conf" file is now deployed....

- Promoted `CustomResourceFieldSelectors` to stable; the feature was enabled by default. The `--feature-gates=CustomResourceFieldSelectors=true` flag was no longer needed on kube-apiserver binaries and would be removed in a future release. ([#127673](https://github.com/kubernetes/kubernetes/pull/127673), [@jpbetz](https://github.com/jpbetz)) [SIG API Machinery and Testing]

    sink.writeUtf8(content)
    sink.close()
  }

  /**
   * @param delta the offset from the current date to use. Negative values yield dates in the past;
   * positive values yield dates in the future.
   */
  private fun formatDate(
    delta: Long,
    timeUnit: TimeUnit,
  ): String = formatDate(Date(System.currentTimeMillis() + timeUnit.toMillis(delta)))

* Federation alpha features do not have feature gates defined and
are hence enabled by default. This will be fixed in a future release.
[#38593](https://github.com/kubernetes/kubernetes/issues/38593)
* Federation control plane can be upgraded by updating the image
fields in the `Deployment` specs of the control plane components.