that prevented the control plane's pod garbage collector from deleting pods that contained duplicated field keys (env. variables with repeated keys or container ports). ([#121381](https://github.com/kubernetes/kubernetes/pull/121381), [@mimowo](https://github.com/mimowo)) [SIG Apps, Auth, Scheduling and Testing]

### Feature

- Added `k8s-short-name` and `k8s-long-name` format validation tags to enforce DNS label and DNS subdomain compliance. ([#133894](https://github.com/kubernetes/kubernetes/pull/133894), [@lalitc375](https://github.com/lalitc375))

		var f File
		err := readDirectoryHeader(&f, strings.NewReader(s))
		if err != nil {
			t.Errorf("error reading #%d: %v", i, err)
		}
	}
}

// Verify we return ErrUnexpectedEOF when length is short.
func TestIssue10957(t *testing.T) {
	data := []byte("PK\x03\x040000000PK\x01\x0200000" +
		"0000000000000000000\x00" +
		"\x00\x00\x00\x00\x00000000000000PK\x01" +
		"\x020000000000000000000" +

- Fix instance not found issues when an Azure Node is recreated in a short time ([#93316](https://github.com/kubernetes/kubernetes/pull/93316), [@feiskyer](https://github.com/feiskyer)) [SIG Cloud Provider]

- Added namespace autocompletion for `kubectl config set-context` command. ([#124994](https://github.com/kubernetes/kubernetes/pull/124994), [@TessaIO](https://github.com/TessaIO)) [SIG CLI]
- Added ports autocompletion for kubectl port-foward command. ([#124683](https://github.com/kubernetes/kubernetes/pull/124683), [@TessaIO](https://github.com/TessaIO)) [SIG CLI]

* Azure: Fix support for multiple `loadBalancerSourceRanges`, and add support for UDP ports and the Service spec's `sessionAffinity`. ([#45523](https://github.com/kubernetes/kubernetes/pull/45523), [@colemickens](https://github.com/colemickens))

## Changelog since v1.15.5

### Other notable changes

* Fix kubelet metrics gathering on non-English Windows hosts ([#84156](https://github.com/kubernetes/kubernetes/pull/84156), [@wawa0210](https://github.com/wawa0210))

  by default, that prevented the control plane's pod garbage collector from deleting
  pods that contained duplicated field keys (environmental variables with repeated keys or
  container ports). ([#121103](https://github.com/kubernetes/kubernetes/pull/121103), [@mimowo](https://github.com/mimowo))

     * traverse. When nodes would otherwise be changed, new nodes are created to replace them. This
     * works well for hash tables since the bin lists tend to be short. (The average length is less
     * than two.)
     *
     * Read operations can thus proceed without locking, but rely on selected uses of volatiles to

* Fix AWS NLB security group updates where valid security group ports were incorrectly removed ([#68422](https://github.com/kubernetes/kubernetes/pull/68422), [@kellycampbell](https://github.com/kellycampbell))
    * when updating a service or when node changes occur.