* Collect metrics from Heapster in Stackdriver mode. ([#50517](https://github.com/kubernetes/kubernetes/pull/50517), [@piosz](https://github.com/piosz))
* fixes a bug around using the Global config ElbSecurityGroup where Kuberentes would modify the passed in Security Group. ([#49805](https://github.com/kubernetes/kubernetes/pull/49805), [@nbutton23](https://github.com/nbutton23))

- `kube-proxy` now has a new nftables-based mode, available by running
  
      `kube-proxy --feature-gates NFTablesProxyMode=true --proxy-mode nftables`
  
  This is currently an alpha-level feature and while it probably will not
  eat your data, it may nibble at it a bit. (It passes e2e testing but has

`kubeadm` applies a number of deprecations and removals of deprecated features in this release. More details are available in the Urgent Upgrade Notes and Kind / Deprecation sections.

### Pod Hostname as FQDN graduates to Beta

    - [Node Binaries](#node-binaries-19)
  - [Changelog since v1.17.0](#changelog-since-v1170)
  - [What’s New (Major Themes)](#whats-new-major-themes)
    - [Kubernetes Topology Manager Moves to Beta - Align Up!](#kubernetes-topology-manager-moves-to-beta---align-up)
    - [Serverside Apply - Beta 2](#serverside-apply---beta-2)

- Code blocks in `kubectl {$COMMAND}--help` will move right by 3 indentation. ([#118029](https://github.com/kubernetes/kubernetes/pull/118029), [@ardaguclu](https://github.com/ardaguclu))
- Compute the backoff delay more accurately for deleted pods ([#118413](https://github.com/kubernetes/kubernetes/pull/118413), [@mimowo](https://github.com/mimowo)) [SIG Apps]

- Kube-proxy's nftables mode (--proxy-mode=nftables) is now beta and available by default.
  
  FIXME ADD MORE HERE BEFORE THE RELEASE, DOCS LINKS AND STUFF ([#124383](https://github.com/kubernetes/kubernetes/pull/124383), [@danwinship](https://github.com/danwinship)) [SIG Cloud Provider and Network]

componentconfig (config file) API and the Kubelet's command line. Be sure to review the default values when migrating to using a config file. For example, the authz mode is set to "AlwaysAllow" if you rely on the command line, but defaults to the more secure "Webhook" mode if you load config from a file. ([#59666](https://github.com/kubernetes/kubernetes/pull/59666), [@mtaufen](https://github.com/mtaufen))

* [GCP kube-up.sh] Variables that were part of kube-env that were only used for...

- Systems running `iptables` 1.8.0 or newer should start it in legacy mode. Please note that this affects all versions of Kubernetes and not only v1.16.0. For more detailed information about the issue and how to apply a workaround, please refer to the official documentation

- Types: ClusterEvent, ActionType, EventResource, ClusterEventWithHint, QueueingHint and QueueingHintFn moved from pkg/scheduler/framework to k8s.io/kube-scheduler/framework. ([#132190](https://github.com/kubernetes/kubernetes/pull/132190), [@ania-borowiec](https://github.com/ania-borowiec)) [SIG Node, Scheduling, Storage and Testing]
- Types: Code and Status moved from pkg/scheduler/framework to staging repo.

'pointerleave',\n  'pointercancel',\n  'gesturestart',\n  'gesturechange',\n  'gestureend',\n  'focus',\n  'blur',\n  'change',\n  'reset',\n  'select',\n  'submit',\n  'focusin',\n  'focusout',\n  'load',\n  'unload',\n  'beforeunload',\n  'resize',\n  'move',\n  'DOMContentLoaded',\n  'readystatechange',\n  'error',\n  'abort',\n  'scroll'\n])\n\n/**\n * Private methods\n */\n\nfunction makeEventUid(element, uid) {\n  return (uid && `${uid}::${uidEvent++}`) || element.uidEvent || uidEvent++\n}\n\nfunction...