o Minor features (authorities)
    - Take altered router IPs into account when determining router stability.
      Previously, if a router changed its IP, the authorities would not
      treat it as having any downtime for the purposes of stability
      calculation, whereas clients would experience downtime since the
      IP could take a while to propagate to them.  Resolves issue 1035.
  o Minor bugfixes (authorities)
    - Try to be more robust to hops back in time when calculating
      router stability.  Previously, if a run of uptime or downtime
      appeared to be negative, the calculation could give incorrect
      results.  Bugfix on 0.2.0.6-alpha.