[tor-bugs] #22727 [Core Tor/Tor]: prop224: Add functions to check for HS v3 support

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#22727: prop224: Add functions to check for HS v3 support
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     Reporter:  dgoulet        |      Owner:  dgoulet
         Type:  enhancement    |     Status:  new
     Priority:  Medium         |  Milestone:  Tor: 0.3.2.x-final
    Component:  Core Tor/Tor   |    Version:
     Severity:  Normal         |   Keywords:  tor-hs, prop224
Actual Points:                 |  Parent ID:  #21888
       Points:                 |   Reviewer:  nickm
      Sponsor:  SponsorR-must  |
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 This is groundwork for prop224.

 It simply adds two functions for to nodelist.h that checks for v3 hsdir
 support (HSDir 3 protover) and ed25519 intro point (HSIntro 4 protover).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/22727>
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