Improve circuit logging

While debugging legacy/trac#23603 (moved), I realized that we mix n_circ_id and globale_identifier in the logs which makes things difficult to match a circuit and sometimes it is just impossible.

We also have no logs when we free a circuit that is going from marked as closed to free. The marked for close log was added recently so at least its that but it prints the n_circ_id which is not always set and thus no way to link it to the global identifier.