o Minor bugfixes (v3 onion services):
    - Stop sending ed25519 link specifiers in v3 onion service introduce
      cells, when the rendezvous point doesn't support ed25519 link
      authentication. Fixes bug 26627; bugfix on 0.3.2.4-alpha.
    - Stop putting ed25519 link specifiers in v3 onion service descriptors,
      when the intro point doesn't support ed25519 link authentication.
      Fixes bug 26627; bugfix on 0.3.2.4-alpha.