o Major features (controller):
    - New ONION_CLIENT_AUTH_ADD control port command to add client-side onion
      service client authorization credentials. Closes part of ticket 30381.
    - New ONION_CLIENT_AUTH_REMOVE control port command to remove client-side
      onion service client authorization credentials. Closes part of ticket
      30381.
    - New ONION_CLIENT_AUTH_VIEW control port command to view stored
      client-side onion service client authorization credentials. Closes part
      of ticket 30381.