- Substantially simplified building Kubernetes by making the process run a pre-built container image directly without running `rsyncd`. ([#134510](https://github.com/kubernetes/kubernetes/pull/134510), [@BenTheElder](https://github.com/BenTheElder)) [SIG Release and Testing]

    val get = server.takeRequest()
    assertThat(get.requestLine).isEqualTo("GET /foo HTTP/1.1")
    assertThat(get.headers["Proxy-Authorization"]).isNull()
  }

  // Don't disconnect after building a tunnel with CONNECT
  // http://code.google.com/p/android/issues/detail?id=37221
  @Test
  fun proxyWithConnectionClose() {
    server.useHttps(handshakeCertificates.sslSocketFactory())
    server.enqueue(

## Changelog since v1.4.0-beta.6

### Other notable changes

* Use a patched go1.7.1 for building linux/arm ([#32517](https://github.com/kubernetes/kubernetes/pull/32517), [@luxas](https://github.com/luxas))

* Support Quobyte as StorageClass ([#31434](https://github.com/kubernetes/kubernetes/pull/31434), [@johscheuer](https://github.com/johscheuer))
* Use a patched go1.7.1 for building linux/arm ([#32517](https://github.com/kubernetes/kubernetes/pull/32517), [@luxas](https://github.com/luxas))

* 🔧 Update sponsors: remove Mobb. PR [#14026](https://github.com/fastapi/fastapi/pull/14026) by [@tiangolo](https://github.com/tiangolo).
* 🛠️ Update `mkdocs_hooks` to handle headers with permalinks when building docs. PR [#14025](https://github.com/fastapi/fastapi/pull/14025) by [@tiangolo](https://github.com/tiangolo).

## Changelog since v1.18.0

## Changes by Kind

### Feature

- deps: Update to Golang 1.13.9
  - build: Remove kube-cross image building ([#89398](https://github.com/kubernetes/kubernetes/pull/89398), [@justaugustus](https://github.com/justaugustus)) [SIG Release and Testing]

### Other (Bug, Cleanup or Flake)

- The go version defined in `.go-version` is now fetched when invoking test, build, and code generation targets if the current go version does not match it. Set $FORCE_HOST_GO=y while testing or building to skip this behavior, or set $GO_VERSION to override the selected go version. ([#115497](https://github.com/kubernetes/kubernetes/pull/115497), [@liggitt](https://github.com/liggitt)) [SIG Release and Testing]

## Changelog since v1.16.8

## Changes by Kind

### Feature

- deps: Update to Golang 1.13.9
  - build: Remove kube-cross image building ([#89400](https://github.com/kubernetes/kubernetes/pull/89400), [@justaugustus](https://github.com/justaugustus)) [SIG Release and Testing]

### Bug or Regression

### SIG Network

* Reduce CSI log and event spam. ([#71581](https://github.com/kubernetes/kubernetes/pull/71581), [@saad-ali](https://github.com/saad-ali))
* Add conntrack as a dependency of kubelet and kubeadm when building rpms and debs. Both require conntrack to handle cleanup of connections. ([#71540](https://github.com/kubernetes/kubernetes/pull/71540), [@mauilion](https://github.com/mauilion))