OSSL_HTTP_REQ_CTX_set1_req
&& !OSSL_HTTP_REQ_CTX_set1_req(rctx, "application/ocsp-request",
int OSSL_HTTP_REQ_CTX_set1_req(OSSL_HTTP_REQ_CTX *rctx, const char *content_type,
OSSL_HTTP_REQ_CTX_set1_req(r, "application/ocsp-request", it, req)