torture_sip.c: added tests for accessing other extra headers beside P-Asserted-Identity/P-Preferred-Identity
torture_sip.c: added tests for accessing other extra headers beside P-Asserted-Identity/P-Preferred-Identity

darcs-hash:20080123171109-65a35-43b68a5ef5b5cedf963612cd2705436dd88500e3.gz

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