lxd/db/networks.go
func (c *ClusterTx) NetworkConfigAdd(networkID, nodeID int64, config map[string]string) error {
	return networkConfigAdd(c.tx, networkID, nodeID, config)
}
func (c *ClusterTx) NetworkConfigAdd(networkID, nodeID int64, config map[string]string) error {
	return networkConfigAdd(c.tx, networkID, nodeID, config)
}
// NetworkConfigAdd adds a new entry in the networks_config table