[tor-bugs] #23113 [Core Tor/Tor]: Manage DNS state better when "All nameservers have failed"

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#23113: Manage DNS state better when "All nameservers have failed"
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 Reporter:  teor               |          Owner:
     Type:  defect             |         Status:  new
 Priority:  Medium             |      Milestone:  Tor: 0.3.2.x-final
Component:  Core Tor/Tor       |        Version:  Tor: 0.2.6.10
 Severity:  Normal             |     Resolution:
 Keywords:  dns, security-low  |  Actual Points:
Parent ID:                     |         Points:  1
 Reviewer:                     |        Sponsor:
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Comment (by hdqdak8v32aor):

 Instead of burying the message, how about fixing the underlying cause,
 which is `eventdns` blindly forwarding malformed DNS queries guaranteed to
 evoke `Bad response 5 (refused)`?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23113#comment:3>
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