Use uint32_t instead of sip_u32_t.
Removed old funtions not using reference counting with messages:
Replaced nta_outgoing_getresponse() with nta_outgoing_getresponse_ref(),
and nta_outgoing_getrequest() with nta_outgoing_getrequest_ref().
Removed nta_incoming_getresponse(), nta_leg_stateful().
Removed nta_outgoing_tmcreate(): use nta_outgoing_mcreate() instead.

darcs-hash:20051107184721-65a35-8b883c5d253b03e04ff91060de6109116375ab8c.gz