Improved keepalive timeout handling in nua/nua_register.c.
Improved keepalive timeout handling in nua/nua_register.c.

darcs-hash:20060503140023-65a35-2a41623e839c651170c6739b98c131eed091f2ee.gz

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