[tor-bugs] #19899 [Core Tor/Tor]: prop224: Add a consensus param to enable/disable next gen onion service

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#19899: prop224: Add a consensus param to enable/disable next gen onion service
------------------------------------------------+--------------------------
 Reporter:  dgoulet                             |          Owner:  dgoulet
     Type:  enhancement                         |         Status:  accepted
 Priority:  High                                |      Milestone:  Tor:
                                                |  0.3.0.x-final
Component:  Core Tor/Tor                        |        Version:
 Severity:  Normal                              |     Resolution:
 Keywords:  prop224, tor-hs, TorCoreTeam201610  |  Actual Points:  0.1
Parent ID:  #17238                              |         Points:  1
 Reviewer:                                      |        Sponsor:
                                                |  SponsorR-must
------------------------------------------------+--------------------------
Changes (by dgoulet):

 * keywords:  prop224, tor-hs, TorCoreTeam201609, nickm-deferred-20161005 =>
     prop224, tor-hs, TorCoreTeam201610


Comment:

 As discussed in Seattle, the idea here would be to have a consensus
 parameters _only_ for client and service but not the relay side. If the
 relay supports a feature, it should use it. This will be comparable to the
 same technique we used for ntor handshake using `UseNTorHandshake=1` at
 once. We'll be able to start switching client and services on as we see
 enough of the network supporting correctly prop224.

 Patch for this will come _after_ #17238 is merged.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19899#comment:9>
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