(void) close (cu->cu_sock);
(void) __close (cu->cu_sock);
clntudp_destroy (CLIENT *cl){  struct cu_data *cu = (struct cu_data *) cl->cl_private;  if (cu->cu_closeit)    {      (void) close (cu->cu_sock);    }  XDR_DESTROY (&(cu->cu_outxdrs));  mem_free ((caddr_t) cu, (sizeof (*cu) + cu->cu_sendsz + cu->cu_recvsz));  mem_free ((caddr_t) cl, sizeof (CLIENT));}