[tor-bugs] #17327 [Tor]: DirAuthority IPv6

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#17327: DirAuthority IPv6
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 Reporter:  svirus       |          Owner:
     Type:  enhancement  |         Status:  needs_review
 Priority:  Medium       |      Milestone:  Tor: 0.2.8.x-final
Component:  Tor          |        Version:
 Severity:  Normal       |     Resolution:
 Keywords:  ipv6         |  Actual Points:
Parent ID:  #17811       |         Points:
  Sponsor:               |
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Changes (by teor):

 * priority:  High => Medium
 * status:  new => needs_review
 * type:  defect => enhancement
 * milestone:   => Tor: 0.2.8.x-final


Comment:

 Please see my branch feature17327-v2 on
 https://github.com/teor2345/tor.git

 It contains:
 * 616cfb72bf: a rebased 043874ee2e from nickm/bug6027_rebased
   * Add a new ipv6=address:orport flag to DirAuthority and FallbackDir
   * tor.1.txt required a manual merge to update to the latest man page
 layout
 * a53ebf3a9b: Authorities on IPv6: minor fixes and unit tests
 * 9dd5ef2480: Add IPv6 addresses & orports to the default directory
 authorities
 * 61a1ead790: Document IPv4 and IPv6 DirPorts
   * Tor assumes that the IPv4 dirport is also available on the relay's
 IPv6 address. (Or, at least, it will when I'm done.)

 The unit tests check that:
 * IPv6 and non-IPv6 authorities and fallbacks work
 * the default authorities and fallbacks load correctly

 These changes are compatible with the latest code in #15775 -
 feature15775-fallback-v9.
 When this code is run on the list of fallback directories attached to
 #15775, they all parse correctly.

 Please note that Tor doesn't use these new IPv6 addresses and ports yet.
 (#17281 will modify Tor clients to use these new IPv6 addresses to
 bootstrap.)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/17327#comment:6>
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