[tor-bugs] #10168 [Tor]: Use monotonic clocks for time as appropriate

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#10168: Use monotonic clocks for time as appropriate
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 Reporter:  nickm        |          Owner:
     Type:  enhancement  |         Status:  new
 Priority:  normal       |      Milestone:  Tor: 0.2.5.x-final
Component:  Tor          |        Version:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
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 In some places, like or or, we want to use wall-clock time.  But in
 others, like timers and so forth, we should be using a monotonic timer so
 we just don't have to worry about time moving backwards.

 Libevent 2.1 has a subsystem for this; we could just use it as needed.  Or
 we could snarf the code and adapt it for our uses.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/10168>
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