o Minor bugfixes (authority):
    - Downgrade log messages about Ed25519 key issues, if they are in
      old cached router descriptors. Fixes part of bug 16286; bugfix on
      0.2.7.2-alpha.

    - When we find an Ed25519 key issue in a cached descriptor, stop saying
      the descriptor was just "uploaded". Fixes another part of bug 16286;
      bugfix on 0.2.7.2-alpha.