Display transport used to register in sip_register.py

darcs-hash:20081212170943-58103-5b9a784d7817ee0ad7073f4c41fe60182cfcec68
Ported new lookup and parsing functions and multi-transport to sip_subscribe_presence.py

darcs-hash:20081212170955-58103-0ae41eadd431e0702ac41cdbf34ea09f79c26725