[tor-bugs] #20218 [Core Tor/Tor]: Fix and refactor and redocument routerstatus_has_changed

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#20218: Fix and refactor and redocument routerstatus_has_changed
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 Reporter:  nickm                                |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.3.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ipv6, 029-proposed, tor-control,     |  Actual Points:  0.5
  easy, spec-conformance, review-group-31,       |
  034-triage-20180328, 034-removed-20180328      |
Parent ID:                                       |         Points:  .1
 Reviewer:  nickm, teor                          |        Sponsor:
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Changes (by maurice_pibouin):

 * status:  needs_revision => needs_review


Comment:

 Made changes according to reviews, will add unit tests at a later time if
 that's ok.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20218#comment:41>
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