Minor tweaks to send_ihu.
Minor tweaks to send_ihu.

jech/babeld,Gwendocg/babeldToS,woniullb/babeld,Gwendocg/babeldToS,boutier/babeld,dtaht/babeld-shortrtt-metrics,Drooids/babeld,sudomesh/babeld,tcatm/babeld,wlanslovenija/babeld,wlanslovenija/babeld,jech/babeld