LIST_REMOVE(domains, d->link->search_domains, d);
LIST_INSERT_AFTER(domains, d->link->search_domains, tail, d);
break;
case DNS_SEARCH_DOMAIN_SYSTEM:
LIST_REMOVE(domains, d->link->search_domains, d);
LIST_INSERT_AFTER(domains, d->link->search_domains, tail, d);
break;
case DNS_SEARCH_DOMAIN_SYSTEM: