- Added `client-go` support for upgrading subresource fields from client-side to server-side management. ([#123484](https://github.com/kubernetes/kubernetes/pull/123484), [@erikgb](https://github.com/erikgb))

  (showing only the starting port). ([#123316](https://github.com/kubernetes/kubernetes/pull/123316), [@jcaamano](https://github.com/jcaamano)) [SIG CLI]
- Fixed a regression where `kubelet --hostname-override` no longer worked
  correctly with an external cloud provider. ([#124516](https://github.com/kubernetes/kubernetes/pull/124516), [@danwinship](https://github.com/danwinship)) [SIG Node]

- Fixed cleanup of Pod volume mounts when a file was used as a subpath. ([#123052](https://github.com/kubernetes/kubernetes/pull/123052), [@jsafrane](https://github.com/jsafrane)) [SIG Node]
- Fixed the disruption controller's PDB status synchronization to maintain all PDB conditions during an update. ([#122056](https://github.com/kubernetes/kubernetes/pull/122056), [@dhenkel92](https://github.com/dhenkel92)) [SIG Apps]

- Features gates `EndpointSliceProxying` & `WindowsEndpointSliceProxying` graduates to GA and are unconditionally enabled. Kube-proxy will use EndpointSlices for endpoint information. ([#103451](https://github.com/kubernetes/kubernetes/pull/103451), [@swetharepakula](https://github.com/swetharepakula))

copy(dst, src []T) int
copy(dst []byte, src string) int
</pre>

<p>
Examples:
</p>

<pre>
var a = [...]int{0, 1, 2, 3, 4, 5, 6, 7}
var s = make([]int, 6)
var b = make([]byte, 5)
n1 := copy(s, a[0:])            // n1 == 6, s is []int{0, 1, 2, 3, 4, 5}
n2 := copy(s, s[2:])            // n2 == 4, s is []int{2, 3, 4, 5, 4, 5}
n3 := copy(b, "Hello, World!")  // n3 == 5, b is []byte("Hello")
</pre>