Added endpoint c to nua/nua_test.c.
Added endpoint c to nua/nua_test.c.

Third endpoint will be used to test call refers.

darcs-hash:20051028065123-65a35-d7e2e7362ee9b74a930ec5a7d1c5b585fbc8497e.gz

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