phyint_group_lookup
pg = phyint_group_lookup(lifreq.lifr_groupname);
pg = phyint_group_lookup(grname);
if ((pg = phyint_group_lookup(grname)) == NULL)
if ((pg = phyint_group_lookup(pg_name)) == NULL) {
extern struct phyint_group *phyint_group_lookup(const char *pg_name);