Improve kubectl built-in help

[Parkofadown]

This is an umbrella issue to manage improvement requests in single issue.

### Tasks
- [ ] [Improvement for k8s.io/docs/reference/kubectl/generated/kubectl_cordon/](https://github.com/kubernetes/kubectl/issues/1632)
- [ ] [Improvement for k8s.io/docs/reference/kubectl/generated/kubectl_events/](https://github.com/kubernetes/kubectl/issues/1635)
- [ ] [Improvement for k8s.io/docs/reference/kubectl/generated/kubectl_kustomize/](https://github.com/kubernetes/kubectl/issues/1636)
- [ ] [Improvement for k8s.io/docs/reference/kubectl/generated/kubectl_label/](https://github.com/kubernetes/kubectl/issues/1637)
- [ ] [Improve behavior of kubectl options](https://github.com/kubernetes/kubectl/issues/1638)

[k8s-ci-robot]

This issue is currently awaiting triage.

SIG Docs takes a lead on issue triage for this website, but any Kubernetes member can accept issues by applying the triage/accepted label.

The triage/accepted label can be added by org members by writing /triage accepted in a comment.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[sftim]

Please bear https://kubernetes.io/docs/reference/kubectl/generated/kubectl_cordon/#auto-generated-edit-notice in mind @Parkofadown

We can transfer the issue for you to the right place (Prow command /transfer kubectl) if you like.

[sftim]

/sig cli

[Parkofadown]

Please bear https://kubernetes.io/docs/reference/kubectl/generated/kubectl_cordon/#auto-generated-edit-notice in mind @Parkofadown

We can transfer the issue for you to the right place (Prow command /transfer kubectl) if you like.

@sftim Thank you , what is a Prow command /transfer kubectl ?

[sftim]

We have a bot to help us manage issues. It's sufficiently advanced that I can:
/transfer kubectl

[sftim]

/sig docs
/area kubectl documentation

[k8s-ci-robot]

@sftim: The label(s) area/documentation cannot be applied, because the repository doesn't have them.

In response to this:

/sig docs
/area kubectl documentation

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.

[sftim]

@Parkofadown this issue has a new URL now, but it's still in a way the “same” issue

[ardaguclu]

This is a doc improvement which is a good thing
/triage accepted
/priority backlog
@Parkofadown would you like to open a PR?