[tor-bugs] #33414 [Core Tor/Tor]: Split router.c, and disable it (mostly) when building without relay support.

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#33414: Split router.c, and disable it (mostly) when building without relay
support.
-------------------------------------------------+-------------------------
 Reporter:  nickm                                |          Owner:  nickm
     Type:  defect                               |         Status:
                                                 |  needs_review
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.4.4.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tor-design, network-team-roadmap-    |  Actual Points:  0.5
  2020Q1, 043-deferred                           |
Parent ID:  #31851                               |         Points:  0.5
 Reviewer:  catalyst                             |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by teor):

 I also opened #33789, to move the address-picking functions to their own
 files.

 nickm, catalyst, if you have an opinion on making these functions client-
 level functions, please comment on that ticket:
 * router_new_address_suggestion()
 * router_guess_address_from_dir_headers()

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/33414#comment:9>
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