OCSP_request_set1_name
LCRYPTO_USED(OCSP_request_set1_name);
int OCSP_request_set1_name(OCSP_REQUEST *req, X509_NAME *nm);
LCRYPTO_ALIAS(OCSP_request_set1_name);
if (!OCSP_request_set1_name(req, X509_get_subject_name(signer)))