nua_subnotref.c: using dialog usage refresher and shutdown functions.
nua_subnotref.c: using dialog usage refresher and shutdown functions.

Now actually retrying after retry-after (either in NOTIFY or in a [3456]XX
response to SUBSCRIBE). Not waiting for final NOTIFY after we terminate
subscription. Wait only when trying to fetch event state.

darcs-hash:20060817183932-65a35-4a6b8eb17638881ac021eb66b0e4298ae7cdeb53.gz

unispeech/sofia-sip,jart/sofia-sip,erdincay/sofia-sip,erdincay/sofia-sip,unispeech/sofia-sip,jart/sofia-sip,BelledonneCommunications/sofia-sip,xhook/sofia-sip,xhook/sofia-sip,unispeech/sofia-sip,xhook/sofia-sip,BelledonneCommunications/sofia-sip,xhook/sofia-sip,erdincay/sofia-sip,xhook/sofia-sip,unispeech/sofia-sip,BelledonneCommunications/sofia-sip,BelledonneCommunications/sofia-sip,jart/sofia-sip,erdincay/sofia-sip