- Graduated relaxed DNS search string validation to GA. For the Pod API, `.spec.dnsConfig.searches`

* You can now use `kubeadm token` specifying `--kubeconfig`.  In this case, kubeadm searches the current user home path and the environment variable KUBECONFIG for existing files. If provided, the `--kubeconfig` flag will be honored instead. ([#62850](https://github.com/kubernetes/kubernetes/pull/62850), [@neolit123](https://github.com/neolit123))...

* Add dns capabilities for Windows CNI plugins: ([#67435](https://github.com/kubernetes/kubernetes/pull/67435), [@feiskyer](https://github.com/feiskyer))
    * "dns" {
    *   "servers": ["10.0.0.10"],
    *   "searches": ["default.svc.cluster.local","svc.cluster.local","cluster.local"],
    *   "options": []
    * }

### Other notable changes

* Fixes CVE-2017-1002101 - See https://issue.k8s.io/60813 for details ([#61047](https://github.com/kubernetes/kubernetes/pull/61047), [@liggitt](https://github.com/liggitt))
* fix CreateVolume func: use search mode instead ([#54687](https://github.com/kubernetes/kubernetes/pull/54687), [@andyzhangx](https://github.com/andyzhangx))

science

// scot : Dot Scot Registry Limited
// https://www.iana.org/domains/root/db/scot.html
scot

// search : Charleston Road Registry Inc.
// https://www.iana.org/domains/root/db/search.html
search

// seat : SEAT, S.A. (Sociedad Unipersonal)
// https://www.iana.org/domains/root/db/seat.html
seat

// secure : Amazon Registry Services, Inc.

### kube-proxy
* **- Add tcp/udp userspace proxy support for Windows. ([#41487](https://github.com/kubernetes/kubernetes/pull/41487), [@anhowe](https://github.com/anhowe))**
* Add DNS suffix search list support in Windows kube-proxy. ([#41618](https://github.com/kubernetes/kubernetes/pull/41618), [@JiangtianLi](https://github.com/JiangtianLi))

- Reverts breaking change to inline AzureFile volumes in v1.20.2-v1.20.5; referenced secrets are now correctly searched for in the same namespace as the pod as in previous releases. ([#100399](https://github.com/kubernetes/kubernetes/pull/100399), [@andyzhangx](https://github.com/andyzhangx)) [SIG Cloud Provider and Storage]

- Promoted `RelaxedDNSSearchValidation` to beta, allowing for Pod search domains to be a single dot "." or contain an underscore "_". ([#130128](https://github.com/kubernetes/kubernetes/pull/130128), [@adrianmoisey](https://github.com/adrianmoisey)) [SIG Apps and Network]

- Allow for Pod search domains to be a single dot `.` or contain an underscore `_` ([#127167](https://github.com/kubernetes/kubernetes/pull/127167), [@adrianmoisey](https://github.com/adrianmoisey)) [SIG Apps, Network and Testing]

* kubeadm: fix a bug where standard kubeconfig paths were searched even if the user provided /etc/kubernetes/admin.conf explicitly for commands that accept --kubeconfig, like kubeadm token. ([#71874](https://github.com/kubernetes/kubernetes/pull/71874), [@neolit123](https://github.com/neolit123))