todo:
-* drop glib from avahi-daemon
-* allow srv port == 0
* deal with no local interface ?
+* doxygen updates
* release!
later:
+* drop glib from avahi-daemon
* support for special domain PTR records based on local IP subnet address
* Changes resulting in updated RFC of 7th June 2005:
* Defer responses to replies with TC bit set by 400-500msec
* add entry_group::reset()
* add internal error codes
* finish DBUS stuff: allow NUL bytes in TXT records
+* allow srv port == 0