Don't bind RTP to normalized local_ip, allows more ICE host candidates

darcs-hash:20090608152116-58103-c9bb8ec9b1c76b874438fb6d11696a9cf182c542
Make Register.register optionally send DidFail notification on exception

darcs-hash:20090608154036-58103-6893e2a24f3c201f4535e17b34353b57394e65af