Back in May when work on bayonne2 was started, I rewrote the original
sip driver which Williams and Aymeric initially worked on. However,
while this work resulted in a more flexible driver that uses script
driven proxy registration rather than a config file, it was still built
against the original exosip library. Sometime shortly after I get back
from Chicago, I am going to look at migrating the Bayonne2 sip to use
the new exosip2 library.