for 0.6:
* Add sensible record updating API
-* add subtype browsing
* add simplification routine for adding services
* remove outgoing queries from queue if the browse object they were issued from is destroyed
* add support for subtypes in static services
-* wrap subtype support for avahi-client
-
later:
* support for special domain PTR records based on local IP subnet address
* Changes resulting in updated RFC of 7th June 2005:
* add flags argument to disable cookies-setting for local services
* add API to add addresses without reverse PTR record
* reset commit throttling for entry groups after a while
+* wrap subtype support for avahi-client
+* add subtype browsing