s3 := append(s2, s0...)            // append a slice              s3 is []int{0, 0, 2, 3, 5, 7, 0, 0}
s4 := append(s3[3:6], s3[2:]...)   // append overlapping slice    s4 is []int{3, 5, 7, 2, 3, 5, 7, 0, 0}

var t []interface{}
t = append(t, 42, 3.1415, "foo")   //                             t is []interface{}{42, 3.1415, "foo"}

var b []byte

### **Application Autoscaling**
#### Horizontal Pod Autoscaler
* [alpha] [HPA Status Conditions](https://kubernetes.io/docs/tasks/run-application/horizontal-pod-autoscale-walkthrough/#appendix-horizontal-pod-autoscaler-status-conditions).


### **Cluster Lifecycle**
#### kubeadm

- Kubeadm: add support for certificate chain validation. When using kubeadm in external CA mode, this allows an intermediate CA to be used to sign the certificates. The intermediate CA certificate must be appended to each signed certificate for this to work correctly. ([#97266](https://github.com/kubernetes/kubernetes/pull/97266), [@robbiemcmichael](https://github.com/robbiemcmichael)) [SIG Cluster Lifecycle]

- Added a new flag `--append-server-path` to `kubectl proxy` that will automatically append the kube context server path to each request. ([#97350](https://github.com/kubernetes/kubernetes/pull/97350), [@FabianKramm](https://github.com/FabianKramm))

- Kubelet config file will be backed up to `/etc/kubernetes/tmp/` folder with `kubeadm-kubelet-config` append with a random suffix as the filename ([#114695](https://github.com/kubernetes/kubernetes/pull/114695), [@chendave](https://github.com/chendave)) [SIG Cluster Lifecycle]

- Aggregated Discovery v2beta1 fixture is removed in `./api/discovery`. Please use v2 ([#127008](https://github.com/kubernetes/kubernetes/pull/127008), [@Jefftree](https://github.com/Jefftree)) [SIG API Machinery]
- Append the image pull error for the pods `status.containerStatuses[*].state.waiting.message` when

- Kubeadm: when using a custom image repository for CoreDNS kubeadm now will append the `coredns` image name instead of `coredns/coredns`, thus restoring the behaviour existing before the v1.21 release. Users who rely on nested folder for the coredns image should set the `clusterConfiguration.dns.imageRepository` value including...