[tor-bugs] #23750 [Core Tor/Tor]: Isolate libevent usage to a few locations

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#23750: Isolate libevent usage to a few locations
-------------------------------------------------+-------------------------
 Reporter:  nickm                                |          Owner:  nickm
     Type:  enhancement                          |         Status:
                                                 |  merge_ready
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.4.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  refactoring, technical-debt,         |  Actual Points:
  review-group-31, 034-triage-20180328,          |
  034-included-20180401                          |
Parent ID:  #25500                               |         Points:
 Reviewer:  dgoulet                              |        Sponsor:
                                                 |  Sponsor8
-------------------------------------------------+-------------------------
Changes (by dgoulet):

 * status:  needs_review => merge_ready


Comment:

 Thanks. Changes lgtm! Not sure if it passes the CI but it passes make test
 I'm happy with the fixes.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23750#comment:9>
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