[metrics-bugs] #18342 [Metrics/Onionoo]: Provide more accurate reverse DNS results

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#18342: Provide more accurate reverse DNS results
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 Reporter:  cypherpunks      |          Owner:  irl
     Type:  defect           |         Status:  needs_revision
 Priority:  Medium           |      Milestone:
Component:  Metrics/Onionoo  |        Version:
 Severity:  Normal           |     Resolution:
 Keywords:  metrics-2018     |  Actual Points:
Parent ID:                   |         Points:
 Reviewer:  karsten          |        Sponsor:
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Changes (by karsten):

 * status:  needs_review => needs_revision


Comment:

 All changes look good, with the only exception being the
 `DomainNameSystem` class that should ideally not be a singleton. See also
 my comment on GitHub. Setting back to needs_revision just for that one.
 Thanks!

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/18342#comment:30>
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