This makes them more consistent with other new interfaces.

Fixes #15839
Reviewed-by: NDavid von Oheimb <david.von.oheimb@siemens.com>
Reviewed-by: NPaul Dale <pauli@openssl.org>
Reviewed-by: NTim Hudson <tjh@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/15861)