* Add ability to configure the NotBefore property of certificates in role api
* Update index.html.md
* converting field to time.Duration
* setting default back to 30s
* renaming the parameter not_before_duration to differentiate between the NotBefore datetime on the cert
* Update description
This will cause them to be removed even if they have not expired yet,
whereas before it would simply leave them in the store until they were
expired, but remove from revocation info.
* Disallow adding CA's serial to revocation list
* Allow disabling revocation list generation. This returns an empty (but
signed) list, but does not affect tracking of revocations so turning it
back on will populate the list properly.
* add require_cn to pki roles
* add policy_identifiers and basic_constraints_valid_for_non_ca to pki role form
* add new fields to the PKI docs
* add add_basic_constraints field
* added a flag to make common name optional if desired
* Cover one more case where cn can be empty
* remove skipping when empty; instead check for emptiness before calling validateNames
* Add verification before adding to DNS names to also fix#3918
* Fix using wrong public key in sign-self-issued
* Change behavior of TTL in sign-intermediate
This allows signing CA certs with an expiration past the signer's
NotAfter.
It also change sign-self-issued to replace the Issuer, since it's
potentially RFC legal but stacks won't validate it.
Ref: https://groups.google.com/d/msg/vault-tool/giP69-n2o20/FfhRpW1vAQAJ
* Add pki/root/sign-self-issued.
This is useful for root CA rolling, and is also suitably dangerous.
Along the way I noticed we weren't setting the authority key IDs
anywhere, so I addressed that.
* Add tests
