Fixed call state events with UPDATE in nua.
Fixed call state events with UPDATE in nua.

Fixed the order the nua_i_update and nua_i_state events are sent.
Now we are using session-timer headers in responses, too.

darcs-hash:20051028143317-65a35-423c61f5d4aaefb6e64d9f8c6de7edaca2929d65.gz

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