remove stale torrents:
    from_transmission:
      host: localhost
      port: 9091
      username: 
      password: 
    if:
      - transmission_progress == 100: accept
      - transmission_date_done > now - timedelta(days=3): reject
    disable: 
      - seen
      - seen_info_hash
    transmission:
      host: localhost
      port: 9091
      username: 
      password: 
      action: purge