SSL_CTX_set_tmp_dh
if (SSL_CTX_set_tmp_dh(ctx, dh) <= 0)
SSL_CTX_set_tmp_dh(s_ctx, dh);
else if (!SSL_CTX_set_tmp_dh(ctx, dh)) {
else if (!SSL_CTX_set_tmp_dh(ctx2, dh)) {