- `kubeadm`: added a new "kubeadm config validate" command that can be used to
  validate any input config file. Use the `--config` flag to pass a config file
  to it. See the command `--help` screen for more information. As a result of adding
  this new command, enhance the validation capabilities of the existing "kubeadm

* Support German cloud for azure disk mount feature ([#50673](https://github.com/kubernetes/kubernetes/pull/50673), [@clement-buchart](https://github.com/clement-buchart))
* Add s390x to juju kubernetes ([#52537](https://github.com/kubernetes/kubernetes/pull/52537), [@ktsakalozos](https://github.com/ktsakalozos))

</pre>

<h2 id="Lexical_elements">Lexical elements</h2>

<h3 id="Comments">Comments</h3>

<p>
Comments serve as program documentation. There are two forms:
</p>

<ol>
<li>
<i>Line comments</i> start with the character sequence <code>//</code>
and stop at the end of the line.
</li>
<li>
<i>General comments</i> start with the character sequence <code>/*</code>

- Kubeadm: deprecate self-hosting support. The experimental command "kubeadm alpha self-hosting" is now deprecated and will be removed in a future release. ([#95125](https://github.com/kubernetes/kubernetes/pull/95125), [@neolit123](https://github.com/neolit123)) [SIG Cluster Lifecycle]

#### Updates to apply
* New command `apply set-last-applied` *updates the applied-applied-configuration annotation* ([#41694](https://github.com/kubernetes/kubernetes/pull/41694), [@shiywang](https://github.com/shiywang))

- YAML documents separators ("---") can now be followed by whitespace and comments ("# ....") on the same line. This fixes a bug where documents starting with a comment after the separator were ignored. Other types of content on the same line will result in an error. ([#103457](https://github.com/kubernetes/kubernetes/pull/103457), [@codearky](https://github.com/codearky)) [SIG API Machinery]

- Kubectl: deprecated command line flags (like several of the klog flags) now have a `DEPRECATED: <explanation>` comment. ([#106172](https://github.com/kubernetes/kubernetes/pull/106172), [@pohly](https://github.com/pohly)) [SIG CLI]

- Fix API comment for the Job Ready field in status ([#121765](https://github.com/kubernetes/kubernetes/pull/121765), [@mimowo](https://github.com/mimowo)) [SIG API Machinery and Apps]

- Resolves a spurious "Unknown discovery response content-type" error in client-go discovery requests by tolerating extra content-type parameters in API responses ([#117637](https://github.com/kubernetes/kubernetes/pull/117637), [@seans3](https://github.com/seans3)) [SIG API Machinery]

- Add auth API to get self subject attributes (new selfsubjectreviews API is added). 
  The corresponding command for kubctl is provided - `kubectl auth whoami`. ([#111333](https://github.com/kubernetes/kubernetes/pull/111333), [@nabokihms](https://github.com/nabokihms)) [SIG API Machinery, Auth, CLI and Testing]