[tor-bugs] #33633 [Core Tor/Tor]: Move extend and reachability code to the relay module

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#33633: Move extend and reachability code to the relay module
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  teor
     Type:  task                                 |         Status:
                                                 |  needs_revision
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.4.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  ipv6, prop311, technical-debt,       |  Actual Points:  1.0
  network-team-roadmap-2020Q1                    |
Parent ID:  #33220                               |         Points:  0.5
 Reviewer:  nickm                                |        Sponsor:
                                                 |  Sponsor55-must
-------------------------------------------------+-------------------------

Comment (by teor):

 (I wrote a unit test for the first function, 5-ish to go.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33633#comment:10>
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