start the retry delay at 10 ms, double it for every failed attempt which makes

#endif /* ENABLE_IPV6 */

  int flag = 1;

  int rc;

  int maxretr = 100;

  int maxretr = 12;

  int delay= 10;

  rc = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,

       (void *)&flag, sizeof(flag));

  while ((rc < 0) && maxretr) {

    maxretr--;

    go_sleep(50);

    go_sleep(delay);

    delay *= 2; /* double the sleep for next attempt */

    rc = setsockopt(sock, SOL_SOCKET, SO_REUSEADDR,

         (void *)&flag, sizeof(flag));

  }