* @param[i/o] timeout Pointer to timeout (in milliseconds). Timeout is assumed zero if the pointer is NULL. After waiting the event timeout value will be decreased on wasted time.
*
* @retval 1 If there's new message.
* @retval 0 If there's no new messages.
* @retval -1 If got error while receiving. The error-code is placed into "errno".
printf_e("Error: Options \"--cluster-ip\", \"--cluster-node-name\", \"--cluster_timeout\" and/or \"cluster_ipport\" cannot be used without \"--cluster-iface\".\n");