* New client-go structure ([#34989](https://github.com/kubernetes/kubernetes/pull/34989), [@caesarxuchao](https://github.com/caesarxuchao))
* Remove scheduler flags that were marked as deprecated 2+ releases ago. ([#34471](https://github.com/kubernetes/kubernetes/pull/34471), [@timothysc](https://github.com/timothysc))

### Other notable changes

Python 3.6 reached the [end-of-life and is no longer supported by Python](https://www.python.org/downloads/release/python-3615/) since around a year ago.

You hopefully updated to a supported version of Python a while ago. If you haven't, you really should.

### Features

### External credential providers

Kubernetes client [credential plugins](https://kubernetes.io/docs/reference/access-authn-authz/authentication/#client-go-credential-plugins) have been in beta since 1.11, a few eons ago. With the release of Kubernetes 1.22, this feature set graduates to stable. The GA feature set includes improved support for plugins that provide interactive login flows.

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- 'The `IPv6DualStack` feature gate for external cloud providers was removed.
  (The feature became GA in 1.23 and the gate was removed for all other
  components several releases ago.) If you were still manually
  enabling it you must stop now.' ([#116255](https://github.com/kubernetes/kubernetes/pull/116255), [@danwinship](https://github.com/danwinship))

- Promote CSIMigrationOpenStack to Beta (off by default since it requires installation of the OpenStack Cinder CSI Driver)

address, and port flags have been removed and replaced by bind-address, insecure-bind-address, and insecure-port, respectively. They are marked as deprecated in [#36604](https://github.com/kubernetes/kubernetes/pull/36604), which is more than a year ago.  ([#59018](https://github.com/kubernetes/kubernetes/pull/59018), [@hzxuzhonghu](https://github.com/hzxuzhonghu))

* The alpha `--init-config-dir` flag has been removed. Instead, use the `--config` flag to reference a kubelet configuration...

it's not adaptive, an // attacker only learns the magnitude of p - q. if diff.BitLenVarTime() <= N.BitLen()/2-100 { return errors.New("crypto/rsa: |p - q| too small") } // Check that d > 2^(nlen/2). // // See section 3 of https://crypto.stanford.edu/~dabo/papers/RSA-survey.pdf // for more details about attacks on small d values. // // Likewise, the leakage of the magnitude of d is not adaptive. if priv.d.BitLenVarTime() <= N.BitLen()/2 { return errors.New("crypto/rsa: d too small") } // If the key is...