[tor-bugs] #8913 [Tor]: update v3 dir spec to say that v2 is obsolete

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#8913: update v3 dir spec to say that v2 is obsolete
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     Reporter:  arma    |      Owner:
         Type:  defect  |     Status:  needs_review
     Priority:  normal  |  Milestone:  Tor: 0.2.5.x-final
    Component:  Tor     |    Version:
   Resolution:          |   Keywords:  tor-spec
Actual Points:          |  Parent ID:
       Points:          |
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Comment (by karsten):

 Changes in your bug8913 branch look good.

 Two more suggestions:

  - So far, the V2Dir flag was specified as "version 2" and really meant
 "version 2 or higher" because the V3Dir flag was never used, right?  Now
 that version 2 is gone, should it at least say "version 2 ''or higher''"?
 It's mentioned twice in dir-spec, in 3.4.1 "Vote and consensus status
 document formats" and 3.4.2 "Assigning flags in a vote".
  - Section 7 "Backward compatibility and migration plans" is pretty much
 obsolete by now.  We could as well remove it in the course of removing v2
 stuff.

 See my bug8913 branch that contains the changes suggested here.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/8913#comment:3>
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