stop asking user if he wants to accept the session after the session was cancelled by caller

darcs-hash:20081119083023-b2873-ca0b4877118b37a872734420229bc3424feb93dc
print Initiating.. message only once; print Ringing.. with contact for each device; changed session formatting to "SIP session (Voice/IM)"

darcs-hash:20081119100424-b2873-777f2bff73f03323844ec61cf8780f85cc7dca11