func (c *SiteReplicationSys) newConcErr(errMap map[string]error, actionName string) error {
	return concErr{
		errMap:     errMap,
		summaryErr: c.toErrorFromErrMap(errMap, actionName),
	}
}

// concDo calls actions concurrently. selfActionFn is run for the current
// cluster and peerActionFn is run for each peer replication cluster.

- New scoring for PodTopologySpreading that yields better spreading ([#90475](https://github.com/kubernetes/kubernetes/pull/90475), [@alculquicondor](https://github.com/alculquicondor)) [SIG Scheduling]
- No actions required. This is a small enhancement to a utility library. ([#92440](https://github.com/kubernetes/kubernetes/pull/92440), [@luigibk](https://github.com/luigibk)) [SIG Network]

- Kubeadm: Switched kubeadm to start using the CRI client library instead of shelling out of the `crictl` binary
  for actions against a CRI endpoint. The kubeadm deb/rpm packages will continue to install the `cri-tools`
  package for one more release, but in you must adapt your scripts to install `crictl` manually from

 ([#64792](https://github.com/kubernetes/kubernetes/pull/64792), [@luxas](https://github.com/luxas))...

- Cloud controller manager's node controller now emits timing metrics for initial `Node` synchronization. These metrics measure the delay between the creation of a new `Node` and the node controller's initial management actions, such as removing the cloud provider taint. These metrics should be consulted when setting cloud controller manager's `--concurrent-node-syncs` flag. ([#119241](https://github.com/kubernetes/kubernetes/pull/119241), [@cartermckinnon](https://gith...

### Auth

- Added `kubectl auth can-i --list` option, which allows users to  know what actions they can do in specific namespaces. ([#64820](https://github.com/kubernetes/kubernetes/pull/64820), [@WanLinghao](https://github.com/WanLinghao))

For initial installations, see the [Setup topics](https://kubernetes.io/docs/setup/pick-right-solution/) in the Kubernetes documentation.

To upgrade to this release from a previous version, first take any actions required [Before Upgrading](https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG/CHANGELOG-1.9.md#before-upgrading).

* The node authorizer now allows nodes to request service account tokens for the service accounts of pods running on them. This allows agents using the node identity to take actions on behalf of local pods. ([#55019](https://github.com/kubernetes/kubernetes/pull/55019), [@mikedanese](https://github.com/mikedanese))

A security issue was discovered in kube-apiserver that could allow an attacker controlled aggregated API server to redirect client traffic to any URL.  This could lead to the client performing unexpected actions as well as leaking the client's credentials to third parties. 

	~[]byte  // the underlying type of []byte is itself
	~MyInt   // illegal: the underlying type of MyInt is not MyInt
	~error   // illegal: error is an interface
}
</pre>

<p>
Union elements denote unions of type sets:
</p>

<pre>
// The Float interface represents all floating-point types
// (including any named types whose underlying types are
// either float32 or float64).
type Float interface {