* add selfsubjectaccessreview API ([#31271](https://github.com/kubernetes/kubernetes/pull/31271), [@deads2k](https://github.com/deads2k))
* Add kubectl describe cmd support for vSphere volume ([#31045](https://github.com/kubernetes/kubernetes/pull/31045), [@abrarshivani](https://github.com/abrarshivani))

pkg syscall (linux-386), const LINUX_REBOOT_CMD_CAD_OFF = 0
pkg syscall (linux-386), const LINUX_REBOOT_CMD_CAD_ON = 2309737967
pkg syscall (linux-386), const LINUX_REBOOT_CMD_HALT = 3454992675
pkg syscall (linux-386), const LINUX_REBOOT_CMD_KEXEC = 1163412803
pkg syscall (linux-386), const LINUX_REBOOT_CMD_POWER_OFF = 1126301404
pkg syscall (linux-386), const LINUX_REBOOT_CMD_RESTART = 19088743

- Add --port flag to kubectl create deployment ([#91113](https://github.com/kubernetes/kubernetes/pull/91113), [@soltysh](https://github.com/soltysh)) [SIG CLI and Testing]
- Add .import-restrictions file to cmd/cloud-controller-manager. ([#90630](https://github.com/kubernetes/kubernetes/pull/90630), [@nilo19](https://github.com/nilo19)) [SIG API Machinery and Cloud Provider]

   See the License for the specific language governing permissions and
   limitations under the License.

------------------

Files: s2/cmd/internal/readahead/*

The MIT License (MIT)

Copyright (c) 2015 Klaus Post

Permission is hereby granted, free of charge, to any person obtaining a copy

## Dependencies

### Added
_Nothing has changed._

### Changed
- sigs.k8s.io/kustomize/api: v0.8.5 → v0.8.8
- sigs.k8s.io/kustomize/cmd/config: v0.9.7 → v0.9.10
- sigs.k8s.io/kustomize/kustomize/v4: v4.0.5 → v4.1.2
- sigs.k8s.io/kustomize/kyaml: v0.10.15 → v0.10.17

### Removed
_Nothing has changed._



# v1.21.0

pkg net, method (*OpError) Unwrap() error
pkg net, type DNSError struct, IsNotFound bool
pkg net, type ListenConfig struct, KeepAlive time.Duration
pkg net/url, method (*Error) Unwrap() error
pkg os/exec, method (*Cmd) String() string
pkg os/exec, method (*Error) Unwrap() error
pkg os, func UserConfigDir() (string, error)
pkg os, method (*LinkError) Unwrap() error
pkg os, method (*PathError) Unwrap() error

### Other Deprecations
* Remove cmd/kube-discovery from the tree since it's not necessary anymore ([#42070](https://github.com/kubernetes/kubernetes/pull/42070), [@luxas](https://github.com/luxas))

## Changes to API Resources
### ABAC

  // +optional
  repeated string command = 3;

  // Arguments to the entrypoint.
  // The container image's CMD is used if this is not provided.
  // Variable references $(VAR_NAME) are expanded using the container's environment. If a variable
  // cannot be resolved, the reference in the input string will be unchanged. Double $$ are reduced

- Enable external plugins can be used as subcommands for kubectl create command if subcommand does not exist as builtin only when KUBECTL_ENABLE_CMD_SHADOW environment variable is exported. ([#116293](https://github.com/kubernetes/kubernetes/pull/116293), [@ardaguclu](https://github.com/ardaguclu))

    * plugin/pkg/scheduler -> pkg/scheduler
    * plugin/cmd/kube-scheduler -> cmd/kube-scheduler
* Bump metadata proxy version to v0.1.7 to pick up security fix. ([#57762](https://github.com/kubernetes/kubernetes/pull/57762), [@ihmccreery](https://github.com/ihmccreery))