k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
r->record_browser_aaaa = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
avahi_key_unref(k);
k = avahi_key_new(host_name, AVAHI_DNS_CLASS_IN, AVAHI_DNS_TYPE_AAAA);
r->record_browser_aaaa = avahi_record_browser_new(server, interface, protocol, k, record_browser_callback, r);
avahi_key_unref(k);