Made sip_audio_session.py not register on outgoing call

darcs-hash:20090407162432-58103-b9298874e0618c64b9476df25fad60eab8873ab3
Changed logging messages in sip_register

Ignore-this: eda12786aa86b5e622ff82ed528ab4e1

darcs-hash:20090407162707-1e3d8-761c368d40cf348a0327b53d08f9a8385e0e5e0f