Replace KERNEL_METRIC with a function.
Replace KERNEL_METRIC with a function.

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