AVAHI_LLIST_PREPEND(AvahiAnnouncer, by_interface, i->announcers, a);
AVAHI_LLIST_PREPEND(AvahiAnnouncer, by_entry, e->announcers, a);
AVAHI_LLIST_PREPEND(AvahiAnnouncer, by_interface, i->announcers, a);
AVAHI_LLIST_PREPEND(AvahiAnnouncer, by_entry, e->announcers, a);