static int can_run_requests(h2o_http2_conn_t *conn)
{
    return conn->num_streams.pull.half_closed + conn->num_streams.push.half_closed <
           conn->super.ctx->globalconf->http2.max_concurrent_requests_per_connection;
}
static int can_run_requests(h2o_http2_conn_t *conn)
{
    return conn->num_streams.pull.half_closed + conn->num_streams.push.half_closed <
           conn->super.ctx->globalconf->http2.max_concurrent_requests_per_connection;
}