2 - Alter circuit build timeout measurement to start at the point
3 where we begin the CREATE/CREATE_FAST step (as opposed to circuit
4 initialization). This should make our timeout measurements more
5 uniform. Previously, we were sometimes including ORconn setup time
6 in our circuit build time measurements. Fixes bug #3443.
9 - If we have no circuits open, use a relaxed timeout (the 95-percentile
10 cutoff) until a circuit succeeds. This should allow Tor to succeed
11 building circuits if the network connection drastically changes.