one for peer selection and organization. reliability is kept around
for the moment and shown on the router console, but only to provide a
comparison (it is not used in any way)
* new stat in the TunnelHistory: failRate
* coallesce TunnelHistory stats (duh!)
* new ProfileOrganizer CLI ("ProfileOrganizer[ filename]*"
* implement reasonable 'failure' logic - if they are actively rejecting
tunnels or tunnels they've agreed to are failing, mark them as failing
* when choosing peers to test, exclude all fast ones
e8e8c37496