See intro notes for Certificate class: https://github.com/nodejs/node/blob/master/doc/api/crypto.md#class-certificate

The link is 404 now: https://www.w3.org/TR/html5/forms.html#the-keygen-element

Last working link time: https://web.archive.org/web/20171207004547/https://www.w3.org/TR/html5/forms.html#the-keygen-element

No <keygen> part in the new spec: https://www.w3.org/TR/html5/sec-forms.html

The cause: https://www.w3.org/TR/html52/changes.html#features-removed

It seems we should change the link at least and maybe add a note about element removal from the spec.

cc @nodejs/crypto