* Add `Option` field to the admission webhook `AdmissionReview` API that provides the operation options (e.g. `DeleteOption` or `CreateOption`) for the operation being performed. ([#77563](https://github.com/kubernetes/kubernetes/pull/77563), [@jpbetz](https://github.com/jpbetz))

  * deleteOptions.orphanDependents is going to be deprecated in 1.7. Please use deleteOptions.propagationPolicy instead.

### kubeadm

accept `context.Context` as a first argument. Signatures of Create, Update, and Patch methods have been updated to accept CreateOptions, UpdateOptions and PatchOptions respectively. Signatures of Delete and DeleteCollection methods now accept DeleteOptions by value instead of by reference. Generated clientsets with the previous interface have been added in new "deprecated" packages to allow incremental migration to the new APIs. The deprecated packages will be removed in the 1.21 release. A tool...

* The `initresource` admission plugin has been removed. ([#58784](https://github.com/kubernetes/kubernetes/pull/58784), [@wackxu](https://github.com/wackxu))
* `ObjectMeta `, `ListOptions`, and `DeleteOptions` have been removed from the core api group.  Please reference them in `meta/v1` instead. ([#61809](https://github.com/kubernetes/kubernetes/pull/61809), [@hzxuzhonghu](https://github.com/hzxuzhonghu))

- Increased the coverage to 89.8%. ([#132607](https://github.com/kubernetes/kubernetes/pull/132607), [@ylink-lfs](https://github.com/ylink-lfs))
- Kube-apiserver: Fixed an issue where passing invalid `DeleteOptions` incorrectly returned a 500 status instead of 400. ([#133358](https://github.com/kubernetes/kubernetes/pull/133358), [@ostrain](https://github.com/ostrain))

- Client-go: pass `DeleteOptions` down to the fake client `Reactor` ([#102945](https://github.com/kubernetes/kubernetes/pull/102945), [@chenchun](https://github.com/chenchun))