* The Kubelet now supports the `--require-kubeconfig` option which reads all client config from the provided `--kubeconfig` file and will cause the Kubelet to exit with error code 1 on error.  It also forces the Kubelet to use the server URL from the kubeconfig file rather than the  `--api-servers` flag.  Without this flag set, a failure to read the kubeconfig file would only result in a warning message. ([#30798](https://github.com/kubernetes/kubernetes/pull/30798),...

// https://www.iana.org/domains/root/db/football.html
football

// ford : Ford Motor Company
// https://www.iana.org/domains/root/db/ford.html
ford

// forex : Dog Beach, LLC
// https://www.iana.org/domains/root/db/forex.html
forex

// forsale : Dog Beach, LLC
// https://www.iana.org/domains/root/db/forsale.html
forsale

// forum : Waterford Limited

      if (!Objects.equals(o1, o2)) {
        return false;
      }
    }
    return !iterator2.hasNext();
  }

  /**
   * Returns a string representation of {@code iterator}, with the format {@code [e1, e2, ..., en]}.
   * The iterator will be left exhausted: its {@code hasNext()} method will return {@code false}.
   */
  public static String toString(Iterator<?> iterator) {

folionetwork.site
folkebibl.no
folldal.no
foo
food
fool.jp
football
for-better.biz
for-more.biz
for-our.info
for-some.biz
for-the.biz
ford
forde.no
forex
forgeblocks.com
forgot.her.name
forgot.his.name
forli-cesena.it
forlicesena.it
forlì-cesena.it
forlìcesena.it
forms.ac
forsale
forsand.no
fortal.br
forum
forum.hu
forumz.info

* Metadata of CustomResources is now pruned and schema-checked during deserialization of requests and when read from etcd. In the former case, invalid meta data is rejected, in the later it is dropped from the CustomResource objects. ([#64267](https://github.com/kubernetes/kubernetes/pull/64267), [@sttts](https://github.com/sttts))

   * Constructs a new {@code CacheBuilder} instance with the settings specified in {@code spec}.
   * This is especially useful for command-line configuration of a {@code CacheBuilder}.
   *
   * @param spec a String in the format specified by {@link CacheBuilderSpec}
   * @since 12.0
   */
  @GwtIncompatible // To be supported
  public static CacheBuilder<Object, Object> from(String spec) {
    return from(CacheBuilderSpec.parse(spec));
  }

- kube-apiserver: fixes error creating system priority classes when starting multiple apiservers simultaneously ([#67372](https://github.com/kubernetes/kubernetes/pull/67372), [@tanshanshan](https://github.com/tanshanshan))
-  Forget rate limit when CRD establish controller successfully updated CRD condition ([#67370](https://github.com/kubernetes/kubernetes/pull/67370), [@yue9944882](https://github.com/yue9944882))

- Improved how the API server responds to **list** requests where the response format negotiates to Protobuf. List responses in Protobuf are marshalled one element at the time, drastically reducing memory needed to serve large collections. Streaming list responses can be disabled via the `StreamingCollectionEncodingToProtobuf` feature...

      "http://[0.0.0.0:0:0:0:0:0:1]/",
      "Invalid URL host: \"[0.0.0.0:0:0:0:0:0:1]\"",
    )
  }

  @Test
  fun hostIpv6WithIncompleteIpv4Suffix() {
    // To Chrome & Safari these are well-formed; Firefox disagrees. (We're consistent with Firefox).
    assertInvalid(
      "http://[0:0:0:0:0:1:255.255.255.]/",
      "Invalid URL host: \"[0:0:0:0:0:1:255.255.255.]\"",
    )
    assertInvalid(

    /** The key of the message: Please contact your site administrator. */
    public static final String LABELS_contact_site_admin = "{labels.contact_site_admin}";

    /** The key of the message: Invalid Request Format. */
    public static final String LABELS_request_error_title = "{labels.request_error_title}";

    /** The key of the message: Your request to the URL is invalid. */