lxd/db/config.go
func (n *NodeTx) Config() (map[string]string, error) {
	return query.SelectConfig(n.tx, "config", "")
}
func (n *NodeTx) Config() (map[string]string, error) {
	return query.SelectConfig(n.tx, "config", "")
}
// Config fetches all LXD node-level config keys.