### Other notable changes

* Connections from Pods to Services with 0 endpoints will now ICMP reject immediately, rather than blackhole and timeout. ([#72534](https://github.com/kubernetes/kubernetes/pull/72534), [@thockin](https://github.com/thockin))

# Fullwidth and escaped UTF-8 fullwidth should still be treated as IP.
# These are "0Xc0.0250.01" in fullwidth.
http://\uff10\uff38\uff43\uff10\uff0e\uff10\uff12\uff15\uff10\uff0e\uff10\uff11  s:http p:/ h:192.168.0.1

# Broken IPv6
http://[google.com]

# Misc Unicode
http://foo:\uD83D\******@****.***/bar  s:http h:example.com p:/bar u:foo pass:%F0%9F%92%A9

# resolving a relative reference against an unknown scheme results in an error

 *  Fix: Change `MockWebServer` to use the same logic as OkHttp when determining
    whether an HTTP request permits a body.
 *  Fix: `HttpUrl` now uses the canonical form for IPv6 addresses.
 *  Fix: Use `HttpUrl` internally.
 *  Fix: Recover from Android 4.2.2 EBADF crashes.
 *  Fix: Don't crash with an `IllegalStateException` if an HTTP/2 or SPDY

- Fixed issue with Winkernel Proxier - IPV6 load balancer policies were missing when service was configured with `ipFamilyPolicy`: `RequireDualStack` ([#115503](https://github.com/kubernetes/kubernetes/pull/115503), [@princepereira](https://github.com/princepereira))

*More Instructions coming soon*

## Provider-specific Notes

* AWS
  * Support for ap-northeast-2 region (Seoul)
  * Allow cross-region image pulling with ECR
  * More reliable kube-up/kube-down
  * Enable ICMP Type 3 Code 4 for ELBs
  * ARP caching fix
  * Use /dev/xvdXX names
  * ELB:
    * ELB proxy protocol support 
	* mixed plaintext/encrypted ports support in ELBs
    * SSL support for ELB listeners

This final piece completes the work needed to comply with Level 1 of the [SLSA security framework](https://slsa.dev/) (Supply-chain Levels for Software Artifacts).

### IPv4/IPv6 Dual-stack Networking graduates to GA

[IPv4/IPv6 dual-stack networking](https://github.com/kubernetes/enhancements/tree/master/keps/sig-network/563-dual-stack) graduates to GA.

- Fixed the EndpointSliceController to correctly create endpoints for IPv6-only pods.
  
  Fixed the EndpointController to allow IPv6 headless services, if the IPv6DualStack
  feature gate is enabled, by specifying `ipFamily: IPv6` on the service. (This already

    assertThat(get.headers[":authority"]).isEqualTo("any-host-name:$port")
    assertThat(get.requestUrl).isEqualTo(url)
  }

  /** Use a proxy to fake IPv6 connectivity, even if localhost doesn't have IPv6.  */
  private fun configureClientAndServerProxies(http2: Boolean) {
    server.useHttps(handshakeCertificates.sslSocketFactory())
    server.protocols =
      when {

- Fixed a regression in `kube-proxy` where it might refuse to start if given
  single-stack `IPv6` configuration options on a node that has both `IPv4` and
  `IPv6` IPs. ([#121008](https://github.com/kubernetes/kubernetes/pull/121008), [@danwinship](https://github.com/danwinship))

### Other notable changes

* Connections from Pods to Services with 0 endpoints will now ICMP reject immediately, rather than blackhole and timeout. ([#72534](https://github.com/kubernetes/kubernetes/pull/72534), [@thockin](https://github.com/thockin))