Remove sipsimple.green.core.GreenRegistration

darcs-hash:20090428162712-58103-d51879bc5f8a2996c4dfecbd17795ebd81b70310
sip_session2: in case of DNS error while resolving routes, don't forget to remove the session

darcs-hash:20090429064840-b2873-480d1cdbbce7ebf170b456ae29ce130e4ff55ff1