[tor-bugs] #21903 [Core Tor/Chutney]: Disable DNS in chutney by default, and add an option to enable it

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#21903: Disable DNS in chutney by default, and add an option to enable it
------------------------------+-----------------------------------
 Reporter:  teor              |          Owner:  teor
     Type:  defect            |         Status:  needs_information
 Priority:  Medium            |      Milestone:
Component:  Core Tor/Chutney  |        Version:
 Severity:  Normal            |     Resolution:
 Keywords:                    |  Actual Points:
Parent ID:  #19573            |         Points:  0.5
 Reviewer:                    |        Sponsor:
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Changes (by teor):

 * status:  needs_review => needs_information


Comment:

 Replying to [comment:3 nickm]:
 > That commit seems plausible, though I do wonder why we're making DNS
 broken-by-default.  Would it be better instead to have DNS work by default
 for chutney started from a command line, and have it disabled specifically
 when running tests that won't use it?  (I'll believe  either answer)

 Due to Tor bug #21900, we have two choices:
 * make chutney work offline by default (but break DNS), or
 * allow DNS in chutney by default (but break offline use).

 I don't mind which default we choose, as long as there is a way to flip
 it.
 So I emailed tor-dev to see what other chutney users want.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21903#comment:4>
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