if bitSize == 0 {
		bitSize = int(strconv.IntSize)
	}

	s0 := s
	switch {
	case len(s) < 1:
		err = strconv.ErrSyntax
		goto Error

	case 2 <= base && base <= 36:
		// valid base; nothing to do

	case base == 0:
		// Look for octal, hex prefix.
		switch {
		case s[0] == '0' && len(s) > 1 && (s[1] == 'x' || s[1] == 'X'):
			base = 16
			s = s[2:]

* Switch default etcd version to 3.0.14. ([#36229](https://github.com/kubernetes/kubernetes/pull/36229), [@wojtek-t](https://github.com/wojtek-t))
    * Switch default storage backend flag in apiserver to `etcd3` mode.

* kubeadm: kubelets in kubeadm clusters now disable the readonly port (10255). If you're relying on unauthenticated access to the readonly port, please switch to using the secure port (10250). Instead, you can now use ServiceAccount tokens when talking to the secure port, which will make it easier to get access to, for example, the `/metrics` endpoint of the kubelet, securely. ([#64187](https://github....

* Update the GCE windows node image to include hot fixes since July. ([#81233](https://github.com/kubernetes/kubernetes/pull/81233), [@YangLu1031](https://github.com/YangLu1031))
* switch to VM Update call in attach/detach disk operation, original CreateOrUpdate call may lead to orphaned VMs or blocked resources ([#81208](https://github.com/kubernetes/kubernetes/pull/81208), [@andyzhangx](https://github.com/andyzhangx))

## Before Upgrading

- Switch scheduler to generate the merge patch on pod status instead of the full pod ([#103133](https://github.com/kubernetes/kubernetes/pull/103133), [@marwanad](https://github.com/marwanad)) [SIG Scheduling]

  Ginkgo V2 doesn't accept go test's `-parallel` flags to parallelize Ginkgo specs, please switch to use `ginkgo -p` or `ginkgo -procs=N` instead. ([#109111](https://github.com/kubernetes/kubernetes/pull/109111), [@chendave](https://github.com/chendave)) [SIG API Machinery, Apps, Architecture, Auth, Autoscaling, CLI, Cloud Provider, Cluster Lifecycle,...

- kubeadm now deletes the bootstrap-kubelet.conf file after TLS bootstrap
  User relying on bootstrap-kubelet.conf should switch to kubelet.conf that contains node credentials ([#80676](https://github.com/kubernetes/kubernetes/pull/80676), [@fabriziopandini](https://github.com/fabriziopandini))

					StoredVersions: []string{"version"},
				},
			},
			errors: []validationMatch{
				forbidden("spec", "validation"),
				forbidden("spec", "subresources"),
			},
		},
		{
			name: "switch off preserveUnknownFields with structural schema before and after",
			old: &apiextensions.CustomResourceDefinition{
				ObjectMeta: metav1.ObjectMeta{
					Name:            "plural.group.com",
					ResourceVersion: "42",

// the width in bytes of this encoding. The size will be 0 if s does not
// hold enough bytes to complete the encoding. len(s) must be greater than 0.
func (t *nfcTrie) lookup(s []byte) (v uint16, sz int) {
	c0 := s[0]
	switch {
	case c0 < 0x80: // is ASCII
		return nfcValues[c0], 1
	case c0 < 0xC2:
		return 0, 1 // Illegal UTF-8: not a starter, not ASCII.
	case c0 < 0xE0: // 2-byte UTF-8
		if len(s) < 2 {
			return 0, 0