SSL_CTX_set_tlsext_status_arg
SSL_CTX_set_tlsext_status_arg(ctx, bio_c_out);
SSL_CTX_set_tlsext_status_arg(ctx, &tlscstatp);
SSL_CTX_set_tlsext_status_arg(ctx2, &tlscstatp);
SSL_CTX_set_tlsext_status_arg(client_ctx, NULL);
SSL_CTX_set_tlsext_status_arg(server_ctx,
SSL_CTX_set_tlsext_status_arg(cctx, &cdummyarg);
SSL_CTX_set_tlsext_status_arg(sctx, &cdummyarg);