[tor-bugs] #31837 [Core Tor/Tor]: Make test_rebind.py more robust

[Tor Bug Tracker & Wiki]

#31837: Make test_rebind.py more robust
-------------------------+-------------------------------------------------
     Reporter:  teor     |      Owner:  teor
         Type:  defect   |     Status:  assigned
     Priority:  Medium   |  Milestone:  Tor: 0.4.2.x-final
    Component:  Core     |    Version:
  Tor/Tor                |   Keywords:  035-backport, 040-backport,
     Severity:  Normal   |  041-backport, BugSmashFund
Actual Points:  0.1      |  Parent ID:
       Points:  0.1      |   Reviewer:
      Sponsor:           |
-------------------------+-------------------------------------------------
 * actually sleep when waiting for tor to log
 * log at debug level when waiting for tor to log
 * backslash-replace bad UTF-8 characters in logs
 * format control commands as ASCII, tor does not accept UTF-8 control
 commands

 Found during #30901.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31837>
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