This commit introduces functions PKCS8_pkey_add1_attr_by_OBJ and PKCS8_pkey_add1_attr
Reviewed-by: NTomas Mraz <tmraz@fedoraproject.org>
Reviewed-by: NShane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/10900)