o Minor bugfixes (process behavior):
    - When exiting because of an error, always exit with a nonzero
      exit status. Previously, we would fail to report an error in
      our exit status in cases related to lockfile contention,
      __OwningControllerProcess failure, and Ed25519 key
      initialization.  Fixes bug 22720; bugfix on versions
      0.2.1.6-alpha, 0.2.2.28-beta, and 0.2.7.2-alpha
      respectively. Reported by "f55jwk4f"; patch from "huyvq".