- When using `kubectl replace` (or the equivalent API call) on a Service, the caller no longer needs to do a read-modify-write cycle to fetch the allocated values for `.spec.clusterIP` and `.spec.ports[].nodePort`.  Instead the API server will automatically carry these forward from the original object when the new object does not...

- The `wait.Poll*` and `wait.ExponentialBackoff*` functions have been deprecated and will be removed in a future release.  Callers should switch to using `wait.PollUntilContextCancel`, `wait.PollUntilContextTimeout`,...

* skip nodes that have a primary NIC in a 'Failed' provisioningState ([#65412](https://github.com/kubernetes/kubernetes/pull/65412), [@yastij](https://github.com/yastij))
* A smaller fix for the apiserver panic. ([#67552](https://github.com/kubernetes/kubernetes/pull/67552), [@wgliang](https://github.com/wgliang))

ernetes/pull/59561), [@nikhita](https://github.com/nikhita))

* Fixed an issue making it possible to create a situation in which two webhooks make it impossible to delete each other. ValidatingWebhooks and MutatingWebhooks will not be called on admission requests for ValidatingWebhookConfiguration and MutatingWebhookConfiguration objects in the admissionregistration.k8s.io group ([#59840](https://github.com/kubernetes/kubernetes/pull/59840), [@jennybuckley](https://github.com/jennybuckley))...

### SIG Network

For 1.13, the areas of focus were in IPv6, DNS improvements and some smaller items:
CoreDNS is now the default cluster DNS passing all of the scale/resource usage tests

    * Added exported env vars to kubectl plugins so that plugin developers have access to global flags, namespace, the plugin descriptor and the full path to the caller binary.
* Ignored mirror pods in PodPreset admission plugin. ([#45958](https://github.com/kubernetes/kubernetes/pull/45958), [@k82cn](https://github.com/k82cn))

- Graduated `AdmissionWebhookMatchCondition` feature to beta. ([#119380](https://github.com/kubernetes/kubernetes/pull/119380), [@a-hilaly](https://github.com/a-hilaly))

- `(*"k8s.io/client-go/rest".Request).{Do,DoRaw,Stream,Watch}` now require callers to pass a `context.Context` as an argument. The context is used for timeout and cancellation signaling and to pass supplementary information to round trippers in the wrapped transport chain. If you don't need any of this functionality, it is sufficient...

      * Added exported env vars to kubectl plugins so that plugin developers have access to global flags, namespace, the plugin descriptor and the full path to the caller binary.

  * Enhancement

    * `kubectl auth can-i` now supports non-resource URLs ([#46432](https://github.com/kubernetes/kubernetes/pull/46432), [@CaoShuFeng](https://github.com/CaoShuFeng))

### Bug or Regression

- Fix Topology Aware Hints not working when the `topology.kubernetes.io/zone` label is added after Node creation
  - Fix a data race in TopologyCache when `AddHints` and `SetNodes` are called concurrently ([#117268](https://github.com/kubernetes/kubernetes/pull/117268), [@tnqn](https://github.com/tnqn)) [SIG Apps and Network]