Instrument Tor client to count directory requests and bridge connections
When estimating user numbers, we have to make assumptions a) on the number of directory requests that an average user makes and b) on the average number of bridge connections that a bridge client opens.
We should instrument a Tor client to log all directory requests and bridge connections, so that we can derive better data from these logs. In fact, the info-level logs of the Tor clients that we use for Torperf may already tell us something about directory requests.