[tor-bugs] #31359 [Core Tor/Tor]: Split a control_event module out of control, and make it use control safe logging

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#31359: Split a control_event module out of control, and make it use control safe
logging
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     Reporter:  teor           |      Owner:  teor
         Type:  enhancement    |     Status:  assigned
     Priority:  Medium         |  Milestone:  Tor: 0.4.3.x-final
    Component:  Core Tor/Tor   |    Version:
     Severity:  Normal         |   Keywords:  network-team-roadmap-august
Actual Points:                 |  Parent ID:  #30901
       Points:  2              |   Reviewer:
      Sponsor:  Sponsor31-can  |
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 Currently, control events can log messages through the standard logging
 module, which can send those logs as  control events. This means that some
 configurations, future code, or errors might cause an infinite loop.

 We should split off a control_event or control_log_event module, and make
 it use control safe logging. All it's dependencies should also use control
 safe or signal safe logging.

 I think we need to make this change after catalyst's control refactor, to
 avoid merge conflicts.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/31359>
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