### Bug or Regression

- Bug: client-go clientset was not defaulting the user agent, using the default golang agent for all the requests. ([#108791](https://github.com/kubernetes/kubernetes/pull/108791), [@aojea](https://github.com/aojea)) [SIG API Machinery and Instrumentation]

	* ip-masq-agent is now on by default for GCE ([#47794](https://github.com/kubernetes/kubernetes/pull/47794), [@dnardo](https://github.com/dnardo))

tolerate zone failure.
     * Simplified way to run a container on every node (DaemonSet API (Beta) in the
Extensions API group): Kubernetes can schedule a service (such as a logging
agent) that runs one, and only one, pod per node.
     * TLS and L7 support (Ingress API (Beta) in the Extensions API group): Kubernetes
is now easier to integrate into custom networking environments by supporting

    * In 1.16, the masq-agent daemonset add-on will switch to using `node.kubernetes.io/masq-agent-ds-ready` as a node selector.
* Kubelet: replace `du` and `find` with a golang implementation ([#74675](https://github.com/kubernetes/kubernetes/pull/74675), [@dashpole](https://github.com/dashpole))

* Enable extensions/v1beta1/NetworkPolicy by default ([#28549](https://github.com/kubernetes/kubernetes/pull/28549), [@caseydavenport](https://github.com/caseydavenport))
* MESOS: Support a pre-installed km binary at a well known, agent-local path ([#28447](https://github.com/kubernetes/kubernetes/pull/28447), [@k82cn](https://github.com/k82cn))

## Changelog since v1.6.1

### Other notable changes

* Fix for [Windows kubectl sending full path to binary in User Agent](https://github.com/kubernetes/kubernetes/issues/44419). ([#44622](https://github.com/kubernetes/kubernetes/pull/44622), [@monopole](https://github.com/monopole))