Test "NAT" acting either symmetric or asymmetric way.
Test "NAT" acting either symmetric or asymmetric way.

darcs-hash:20060309181702-65a35-2c33eda1863502c9ac19b973578848370b102dd9.gz

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