* To reduce memory usage to reasonable levels in smaller clusters, kube-apiserver now sets the deserialization cache size based on the target memory usage. ([#34000](https://github.com/kubernetes/kubernetes/pull/34000), [@wojtek-t](https://github.com/wojtek-t))
* Fix possible panic in PodAffinityChecker ([#33086](https://github.com/kubernetes/kubernetes/pull/33086), [@ivan4th](https://github.com/ivan4th))

* To reduce memory usage to reasonable levels in smaller clusters, kube-apiserver now sets the deserialization cache size based on the target memory usage. ([#34000](https://github.com/kubernetes/kubernetes/pull/34000), [@wojtek-t](https://github.com/wojtek-t))
* use service accounts as clients for controllers ([#33310](https://github.com/kubernetes/kubernetes/pull/33310), [@deads2k](https://github.com/deads2k))

    // medium mathematical space
    assertThat(parse("http://h/\u205f").encodedPath).isEqualTo("/%E2%81%9F")
    // ideographic space
    assertThat(parse("http://h/\u3000").encodedPath).isEqualTo("/%E3%80%80")
  }

  @Test
  fun newBuilderResolve() {
    // Non-exhaustive tests because implementation is the same as resolve.
    val base = parse("http://host/a/b")

* Alpha version of dynamic volume provisioning is removed in this release. Annotation ([#40000](https://github.com/kubernetes/kubernetes/pull/40000), [@jsafrane](https://github.com/jsafrane))
    * "volume.alpha.kubernetes.io/storage-class" does not have any special meaning. A default storage class

* The `METADATA_AGENT_VERSION` configuration option has been removed to keep metadata agent version consistent across Kubernetes deployments. ([#63000](https://github.com/kubernetes/kubernetes/pull/63000), [@kawych](https://github.com/kawych))

323B0..3FFFD  ; disallowed                             # NA   <reserved-323B0>..<reserved-3FFFD>
3FFFE..3FFFF  ; disallowed                             # 2.0  <noncharacter-3FFFE>..<noncharacter-3FFFF>
40000..4FFFD  ; disallowed                             # NA   <reserved-40000>..<reserved-4FFFD>
4FFFE..4FFFF  ; disallowed                             # 2.0  <noncharacter-4FFFE>..<noncharacter-4FFFF>

* Fixed misspelled http URL in the cluster-dns example ([#45246](https://github.com/kubernetes/kubernetes/pull/45246), [@psiwczak](https://github.com/psiwczak))
* separate discovery from the apiserver ([#43003](https://github.com/kubernetes/kubernetes/pull/43003), [@deads2k](https://github.com/deads2k))

* Remove METADATA_AGENT_VERSION configuration option. ([#63000](https://github.com/kubernetes/kubernetes/pull/63000), [@kawych](https://github.com/kawych))

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