tor/changes/ticket40491

  o Major bugfixes (relay, overload state):
    - Report the general overload state for DNS timeout errors only if X% of all
      DNS queries over Y seconds are errors. Before that, it only took 1 timeout
      to report the overload state which was just too low of a threshold. The X
      and Y values are 1% and 10 minutes respectively but they are also
      controlled by consensus parameters. Fixes bug 40491; bugfix on
      0.4.6.1-alpha.