+/** Browse for services of a type on the network. In most cases you
+ * probably want to pass AVAHI_IF_UNSPEC and AVAHI_PROTO_UNSPED in
+ * interface, resp. protocol to browse on all local networks. The
+ * specified callback will be called whenever a new service appears
+ * or is removed from the network. Please note that events may be
+ * collapsed to minimize traffic (i.e. a REMOVED followed by a NEW for
+ * the same service data is dropped because redundant). If you want to
+ * subscribe to service data changes, you should use
+ * avahi_service_resolver_new() and keep it open, in which case you
+ * will be notified via AVAHI_RESOLVE_FOUND everytime the service data
+ * changes. */