- Promoted the `EnvFiles` feature gate to beta and is enabled by default. Additionally, the syntax specification for environment variables has been restricted to a subset of POSIX shell syntax (all variable values must be wrapped in single quotes). ([#134414](https://github.com/kubernetes/kubernetes/pull/134414), [@HirazawaUi](https://github.com/HirazawaUi)) [SIG Node and Testing]

	}

	s.RestartIAMSuite(c)
}

func (s *TestSuiteIAM) SetUpSuite(c *check) {
	// If etcd backend is specified and etcd server is not present, the test
	// is skipped.
	etcdServer := env.Get(EnvTestEtcdBackend, "")
	if s.withEtcdBackend && etcdServer == "" {
		c.Skip("Skipping etcd backend IAM test as no etcd server is configured.")
	}

	s.TestSuiteCommon.SetUpSuite(c)

		if client.deadline == 0 {
			client.cancelFn(context.DeadlineExceeded)
			return nil, context.DeadlineExceeded
		}
	}
	for {
		// Handle the extremely unlikely scenario that we wrapped.
		if _, loaded := c.outgoing.LoadOrStore(client.MuxID, client); client.MuxID != 0 && !loaded {
			if debugReqs {
				_, found := c.outgoing.Load(client.MuxID)

- kube-apiserver: fixed a 1.31 regression that stopped honoring build ID overrides with the --version flag ([#126665](https://github.com/kubernetes/kubernetes/pull/126665), [@liggitt](https://github.com/liggitt)) [SIG API Machinery]

 * `http://ho™ail.com`. To mitigate this, the single character (™) maps to the string (tm). There
 * is similar policy for all of the 1.1 million Unicode code points. Note that some code points such
 * as "\ud83c\udf69" are not mapped and cannot be used in a hostname.
 *
 * [Punycode](http://ietf.org/rfc/rfc3492.txt) converts a Unicode string to an ASCII string to make

   * serializable.
   *
   * <p><b>Java 8+ users and later:</b> Prefer {@link Collections#synchronizedNavigableSet}.
   *
   * @param navigableSet the navigable set to be "wrapped" in a synchronized navigable set.
   * @return a synchronized view of the specified navigable set.
   * @since 13.0
   */
  @GwtIncompatible // NavigableSet
  @J2ktIncompatible // Synchronized

## Changelog since v1.28.0

## Urgent Upgrade Notes 

### (No, really, you MUST read this before you upgrade)

//	    (that are executed by other agents) or when customers pass requests through proxies, which may
//	    modify the user-agent.
//
//	Authorization:
//
//	    Is skipped for obvious reasons
var ignoredHeaders = map[string]bool{
	"Authorization": true,
	"User-Agent":    true,
}

// Headers to ignore in streaming v4
var ignoredStreamingHeaders = map[string]bool{

- Improved CRI handling
  - crictl is no longer required in docker-only setups.
  - Better detection of installed CRI.
  - Better output for image pull errors.
- Improved air-gapped and offline support
  - kubeadm now handles air-gapped environments by using the local client version as a fallback.
  - Some kubeadm commands are now allowed to work in a completely offline mode.
- Certificate handling improvements:

lLeft","linear","p","swing","cos","PI","fxNow","inProgress","opt","rfxtypes","rrun","schedule","hidden","requestAnimationFrame","interval","tick","createFxNow","genFx","includeWidth","createTween","animation","Animation","tweeners","properties","stopped","prefilters","currentTime","startTime","tweens","opts","specialEasing","originalProperties","originalOptions","gotoEnd","propFilter","bind","complete","timer","anim","*","tweener","oldfire","propTween","restoreDisplay","isBox","dataShow","unqueu...