ifa_grouplookup
h = ifa_grouplookup(ifname, 0);
if ((h = ifa_grouplookup(p->pfik_name, 0)) == NULL)
if ((h = ifa_grouplookup(p->pfik_name, 0)) == NULL)
if ((h = ifa_grouplookup(ifa_name, flags)) != NULL)
struct node_host *ifa_grouplookup(char *ifa_name, int flags);