([#121834](https://github.com/kubernetes/kubernetes/pull/121834), [@vaibhav2107](https://github.com/vaibhav2107))
- Changed the API server so that for admission webhooks that have a URL matching the hostname 'localhost' or a loopback IP address, the connection supports HTTP/2 where it could be negotiated.
   ([#122558](https://github.com/kubernetes/kubernetes/pull/122558), [@linxiulei](https://github.com/linxiulei))

#### Cluster Selection
* [alpha] Federation [ClusterSelector annotation](https://kubernetes.io/docs/tasks/administer-federation/cluster/#clusterselector-annotation) to direct objects to federated clusters with matching labels.


### **Instrumentation**
#### Core Metrics API

* kubectl cp now safely allows unpacking of symlinks that may point outside the destination directory ([#82384](https://github.com/kubernetes/kubernetes/pull/82384), [@tallclair](https://github.com/tallclair))
* fix azure disk naming matching issue due to case sensitive comparison ([#81720](https://github.com/kubernetes/kubernetes/pull/81720), [@andyzhangx](https://github.com/andyzhangx))

* Advanced audit now correctly reports impersonated user info. ([#48184](https://github.com/kubernetes/kubernetes/pull/48184), [@CaoShuFeng](https://github.com/CaoShuFeng))

    *   Added `namespaceSelector` to `externalAdmissionWebhook` configuration to allow applying webhooks only to objects in the namespaces that have matching labels. ([#54727](https://github.com/kubernetes/kubernetes/pull/54727),[ @caesarxuchao](https://github.com/caesarxuchao))

- Namespace API objects now have a `kubernetes.io/metadata.name` label matching their metadata.name field to allow selecting any namespace by its name using a label selector. ([#96968](https://github.com/kubernetes/kubernetes/pull/96968), [@jayunit100](https://github.com/jayunit100)) [SIG API Machinery, Apps, Cloud Provider,...

* When prompting for passwords, don't echo to the terminal ([#31586](https://github.com/kubernetes/kubernetes/pull/31586), [@brendandburns](https://github.com/brendandburns))
* add group prefix matching for kubectl usage ([#32140](https://github.com/kubernetes/kubernetes/pull/32140), [@deads2k](https://github.com/deads2k))

			if isStructUnionClass(t.Go) {
				t.Typedef = dt.Name
			}
		}
	}
	return t
}

// FuncType returns the Go type analogous to dtype.
// There is no guarantee about matching memory layout.
func (c *typeConv) FuncType(dtype *dwarf.FuncType, pos token.Pos) *FuncType {
	p := make([]*Type, len(dtype.ParamType))
	gp := make([]*ast.Field, len(dtype.ParamType))
	for i, f := range dtype.ParamType {

- Fixed recursive LIST from watch cache returning object matching key. ([#125584](https://github.com/kubernetes/kubernetes/pull/125584), [@serathius](https://github.com/serathius)) [SIG API Machinery and Testing]

- First pod with required affinity terms can schedule only on nodes with matching topology keys. ([#91168](https://github.com/kubernetes/kubernetes/pull/91168), [@ahg-g](https://github.com/ahg-g)) [SIG Scheduling]