* Support for passing unknown provider names to the E2E test binaries is going to be deprecated. Use `--provider=skeleton` (no ssh access) or `--provider=local` (local cluster with ssh) instead. ([#70141](https://github.com/kubernetes/kubernetes/pull/70141), [@pohly](https://github.com/pohly))

## **Notable Features**

In some cases, for pure data validation and processing, you can get performance improvements of **20x** or more. This means 2,000% or more. 🤯

When you use **FastAPI**, there's a lot more going on, processing the request and response, handling dependencies, executing **your own code**, and particularly, **waiting for the network**. But you will probably still get some nice performance improvements just from the upgrade.

* fixed foreground deletion of podtemplates ([#60683](https://github.com/kubernetes/kubernetes/pull/60683), [@nilebox](https://github.com/nilebox))
* Timeout docker queries to prevent node going NotReady indefinitely. ([#56967](https://github.com/kubernetes/kubernetes/pull/56967), [@jsravn](https://github.com/jsravn))

* ReplicationController now shares its underlying controller implementation with ReplicaSet to reduce the maintenance burden going forward. However, they are still separate resources and there should be no externally visible effects from this change. ([#49429](https://github.com/kubernetes/kubernetes/pull/49429), [@enisoc](https://github.com/enisoc))

- [API Server Network Proxy](https://github.com/kubernetes/enhancements/blob/master/keps/sig-api-machinery/1281-network-proxy/README.md) going alpha in 1.16.
- [Extensions](https://github.com/kubernetes/enhancements/blob/master/keps/sig-cloud-provider/991-cloud-controller-migration/README.md) for Cloud Controller Manager Migration.

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We should be able to simplify the rules for comparable or delegate some of them
elsewhere since we have a section that clearly defines how interfaces implement
other interfaces based on their type sets. But this should get us going for now.
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<p>
The <a href="#Predeclared_identifiers">predeclared</a>
<a href="#Interface_types">interface type</a> <code>comparable</code>
denotes the set of all non-interface types that are

- Kubeadm: The ClusterStatus struct present in the kubeadm-config ConfigMap is deprecated and will be removed on a future version. It is going to be maintained by kubeadm until it gets removed. The same information can be found on `etcd` and `kube-apiserver` pod annotations, `kubeadm.kubernetes.io/etcd.advertise-client-urls` and `kubeadm.kubernetes.io/kube-apiserver.advertise-address.endpoint`...

x2lo, x2hi := mul51(x.l2, y) x3lo, x3hi := mul51(x.l3, y) x4lo, x4hi := mul51(x.l4, y) v.l0 = x0lo + 19*x4hi // carried over per the reduction identity v.l1 = x1lo + x0hi v.l2 = x2lo + x1hi v.l3 = x3lo + x2hi v.l4 = x4lo + x3hi // The hi portions are going to be only 32 bits, plus any previous excess, // so we can skip the carry propagation. return v } // mul51 returns lo + hi * 2⁵¹ = a * b. func mul51(a uint64, b uint32) (lo uint64, hi uint64) { mh, ml := bits.Mul64(a, uint64(b)) lo = ml & maskLow51Bits...