- kubeadm: make the command "kubeadm alpha kubeconfig user" accept a "--config" flag and remove the following flags:
  - apiserver-advertise-address / apiserver-bind-port: use either localAPIEndpoint from InitConfiguration or controlPlaneEndpoint from ClusterConfiguration.
  - cluster-name: use clusterName from ClusterConfiguration

* The kubeadm config option `API.ControlPlaneEndpoint` has been extended to take an optional port, which may differ from the apiserver's bind port. ([#62314](https://github.com/kubernetes/kubernetes/pull/62314), [@rjosephwright](https://github.com/rjosephwright))

- Kubeadm: improve the strict parsing of user YAML/JSON configuration files. Next to printing warnings for unknown and duplicate fields (current state), also print warnings for fields with incorrect case sensitivity - e.g. `controlPlaneEndpoint` (valid), `ControlPlaneEndpoint` (invalid). Instead of only printing warnings during `init` and `join` also print warnings when downloading the ClusterConfiguration, KubeletConfiguration or KubeProxyConfiguration objects from the cluster. This can be useful...

- The  command line option  --cri-socket-path of the kubeadm subcommand "kubeadm config images pull" has been renamed to --cri-socket to be consistent with the rest of kubeadm subcommands.
- kubeadm: The ControlPlaneEndpoint was moved from the API config struct to ClusterConfiguration ([#67830](https://github.com/kubernetes/kubernetes/pull/67830), [@fabriziopandini](https://github.com/fabriziopandini))

- kubeadm: provide `--control-plane-endpoint` flag for `controlPlaneEndpoint` ([#79270](https://github.com/kubernetes/kubernetes/pull/79270), [@SataQiu](https://github.com/SataQiu))

- Kubeadm: make the kubeconfig files for the kube-controller-manager and kube-scheduler use the LocalAPIEndpoint instead of the ControlPlaneEndpoint. This makes kubeadm clusters more reseliant to version skew problems during immutable upgrades: https://kubernetes.io/docs/setup/release/version-skew-policy/#kube-controller-manager-kube-scheduler-and-cloud-controller-manager ([#94398](htt...