[tor-bugs] #28897 [Core Tor/sbws]: Stop running twice destination usability tests

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#28897: Stop running twice destination usability tests
---------------------------+-----------------------------------
 Reporter:  juga           |          Owner:  juga
     Type:  defect         |         Status:  needs_revision
 Priority:  Medium         |      Milestone:  sbws: 1.0.x-final
Component:  Core Tor/sbws  |        Version:  sbws: 1.0.2
 Severity:  Normal         |     Resolution:
 Keywords:                 |  Actual Points:
Parent ID:  #28663         |         Points:
 Reviewer:                 |        Sponsor:
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Changes (by juga):

 * status:  needs_review => needs_revision


Comment:

 I thought that there's no need of a big refactor to check if a destination
 is "usable".
 Every time that a destination is used (`in
 connect_destination_over_circuit`) and it fails, it can be recorded since
 there's already a lock.
 Putting this in revision to implement this before review.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/28897#comment:2>
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