Python 3 script to update a Gandi zone with the current Livebox ipv4 wan address
livebox file: use http POST request to query the livebox WAN status, including the current WAN ipv4 address it doesn't need the admin livebox password
gandi file: use Gandi xmlrpc API to check if the configured DNS zone is up to date
settings: loads Gandi api key and other things from a .rc file