Metrics shouldn't rely on GetTor to provide history
Currently, GetTor is keeping all its logfiles around, since the beginning of mankind -- in the blind assumption that metrics is going to need them all to keep the shiny nice GetTor graphs the way they are.
I'd like to clean that up a bit in the way that metrics just needs the latest N days of history, where N is a value between one and thirty days maybe. (One day of history necessary would be best, of course)
Maybe karsten can clear up whether this actually needs change in the metrics code.