+* consolidate browsing failure events and add an API to query the reason
+* Add sensible record updating API
+* rename AvahiAnnouncement to AvahiAnnouncer (to match AvahiQuerier)
+* implement avahi_client_add_address
+* remove AVAHI_PUBLISH_IS_PROXY
+* replace avahi_server_is_service_local() by AVAHI_PUBLISH flag