net_ctl_send_error
net_ctl_send_error(p, 0);
net_ctl_send_error(p, 0);
int net_ctl_send_error(struct syncpeer *, enum CTLTYPE);
net_ctl_send_error(p, CTL_STATE);
net_ctl_send_error(p, CTL_STATE);
net_ctl_send_error(p, CTL_UNKNOWN);