Function submit_bidi_receive

examples/proxy.c:747–751

* Bi-directional arms receive on both in and out fd */

 * Bi-directional arms receive on both in and out fd
 */
static void submit_bidi_receive(struct io_uring *ring, struct conn *c)
{
	__submit_receive(ring, c, &c->cd[0], c->in_fd);
	__submit_receive(ring, c, &c->cd[1], c->out_fd);
}

/*
 * We hit -ENOBUFS, which means that we ran out of buffers in our current