An application followed a firewall's upgrade, edited its resolver's
forwards and read its OSPF state through the driver's private REST
helpers (NetOrk/netork#1113). Declared contracts, neutral shapes:
- UpdateMixin.get_update_progress() -> UpdateProgressDict {state, log}
for an update apply_updates only starts.
- DnsForwardMixin: get_dns_forwards(), set_dns_forward(domain, server,
port), remove_dns_forward(domain); the driver applies.
- OspfMixin.get_ospf() -> OspfDict {router_id, areas, interfaces}; the
routing daemon's format is the driver's to translate.
All declared only.
