[tor-bugs] #15642 [Tor]: Disable default fallback directories when DirAuthorities, AlternateDirAuthority, or FallbackDir are set

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#15642: Disable default fallback directories when DirAuthorities,
AlternateDirAuthority, or FallbackDir are set
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     Reporter:  teor    |      Owner:  teor
         Type:  defect  |     Status:  needs_review
     Priority:  minor   |  Milestone:  Tor: 0.2.7.x-final
    Component:  Tor     |    Version:  Tor: 0.2.4.7-alpha
   Resolution:          |   Keywords:  tor-client tor-relay
Actual Points:          |  Parent ID:
       Points:          |
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Changes (by teor):

 * cc: isabella (added)
 * status:  needs_information => needs_review


Comment:

 I will split off populating the directory authorities list and the signed
 file into other tickets.

 This bug needs to be fixed and is suitable for review.

 '''Branch:''' bug-15642-v3-fallback-unit-tests
 '''Repository:''' ​​https://github.com/teor2345/tor.git

 Commits:

     * Fix to default fallback directories behaviour
     * Unit tests for consider_adding_dir_servers based on fixed default
 fallback directories behaviour. These are extensive because they cover
 each of 10 valid cases. There may be ways to abstract some of these shared
 code, but I feel it would make the tests less clear.

 In 0.2.7 per nickm.

 Isabella, can you please add the right keywords for 0.2.7?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/15642#comment:11>
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