[tor-bugs] #13790 [Core Tor/Tor]: Refactor and add comments to new_route_len()

[Tor Bug Tracker & Wiki]

#13790: Refactor and add comments to new_route_len()
-------------------------------------------------+-------------------------
 Reporter:  dgoulet                              |          Owner:
                                                 |  catalyst
     Type:  enhancement                          |         Status:
                                                 |  needs_revision
 Priority:  Low                                  |      Milestone:  Tor:
                                                 |  0.3.1.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  026-deferrable,                      |  Actual Points:
  tor-03-unspecified-201612, review-group-16     |
Parent ID:                                       |         Points:
 Reviewer:  dgoulet                              |        Sponsor:
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Changes (by dgoulet):

 * status:  needs_review => needs_revision


Comment:

 Thanks arma! It should go in the "Why Tor is like that?" FAQ :)

 Ok, I went over the patch. It's pretty solid. I made a small comment on
 the Gitlab about adding a `BUG()` macro in case a purpose can't be handled
 so we can get a stacktrace instead of a simple log line. With that, I'm
 confident this is `merge_ready`

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/13790#comment:19>
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