[tor-bugs] #24181 [Core Tor/Tor]: Put unrecognised link specifiers in onion service EXTEND cells

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#24181: Put unrecognised link specifiers in onion service EXTEND cells
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     Reporter:  teor     |      Owner:  (none)
         Type:  defect   |     Status:  new
     Priority:  Medium   |  Milestone:  Tor: 0.3.3.x-final
    Component:  Core     |    Version:  Tor: 0.3.2.1-alpha
  Tor/Tor                |   Keywords:  prop224, tor-hs, single-onion,
     Severity:  Normal   |  ipv6, tor-spec
Actual Points:           |  Parent ID:  #23493
       Points:  3        |   Reviewer:
      Sponsor:           |
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 Prop224 says:
 {{{
 The hidden service SHOULD NOT reject any LSTYPE fields which it
 doesn't recognize; instead, it should use them verbatim in its EXTEND
 request to the rendezvous point.
 }}}
 https://gitweb.torproject.org/torspec.git/tree/proposals/224-rend-spec-
 ng.txt#n1689

 We should either remove this from the spec, or we should:
 * add a similar sentence for client descriptor lspecs
 * put unrecognised lspecs in descriptors in client intro EXTEND requests
 * put unrecognised lspecs in INTRODUCE cells in service rend EXTEND
 requests

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24181>
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