[tor-bugs] #12597 [Tor]: Make all relays directory servers

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#12597: Make all relays directory servers
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 Reporter:  asn                  |          Owner:
     Type:  task                 |         Status:  new
 Priority:  normal               |      Milestone:  Tor: 0.2.6.x-final
Component:  Tor                  |        Version:
 Keywords:  tor-guard tor-relay  |  Actual Points:
Parent ID:                       |         Points:
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 During the entry guard discussions, we have decided that it's a good idea
 to make all relays directory servers. We mainly needed the entry guards to
 be directories, but it seems easier and more elegant to just turn all
 relays to directory servers.

 This is easier nowadays than in the past because `BEGIN_DIR` makes it so
 that directory servers don't need to have a separate DirPort open.
 (However, maybe relays get the `V2Dir` flag only if they have a DirPort
 open?)

 Also, since all relays have all the directory documents anyway, it doesn't
 further bloat their disk to become directory servers.

 Putting this in 0.2.6, but probably deferrable.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/12597>
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