auth_zone_cmp
rbtree_init(&az->ztree, &auth_zone_cmp);
int auth_zone_cmp(const void* z1, const void* z2);
else if(fptr == &auth_zone_cmp) return 1;
rbtree_init(&az->ztree, &auth_zone_cmp);
int auth_zone_cmp(const void* z1, const void* z2);
else if(fptr == &auth_zone_cmp) return 1;