Fix warnings from lintchanges

      tried to avoid downloading such descriptors by other means, but

      we didn't notice if we accidentally downloaded one anyway. This

      behavior became problematic in 0.2.7.2-alpha, when authorities

      began pinning Ed25519 keys. Fixes ticket

      began pinning Ed25519 keys. Fixes bug

      22349; bugfix on 0.2.1.19-alpha.

 o Build features:

  o Major features (build system):

    - Tor's repository now includes a Travis Continuous Integration (CI)

      configuration file (.travis.yml). This is meant to help new developers and

      contributors who fork Tor to a Github repository be better able to test

      their changes, and understand what we expect to pass. To use this new build

      feature, you must fork Tor to your Github account, then go into the

      "Integrations" menu in the repository settings for your fork and enable

     Travis, then push your changes.

      Travis, then push your changes. Closes ticket 22636.

 o Minor bugfixes:

  o Minor bugfixes (build system, rust):

    - Fix a problem with Rust toolchains not being found when building

      without --enable-cargo-online-mode, due to setting the $HOME

     environment variable instead of $CARGO_HOME.  Fixes bug 22830;

     fix by Chelsea Komlo.  Bugfix on 0.3.1.1-alpha.

      environment variable instead of $CARGO_HOME.  Fixes bug 22830; bugfix on 0.3.1.1-alpha.

      Fix by Chelsea Komlo.

  o Minor features:

  o Minor features (bridge authority):

    - Add "fingerprint" line to networkstatus-bridges produced by

      bridge authorities. Implements #22207.

      bridge authorities. Closes ticket 22207.