cfg.Compression.MimeTypes = strings.Split(compress.DefaultMimeTypes, config.ValueSeparator)
	case "30":
		// V30 -> V31
		cfg.OpenID = openid.Config{}
		cfg.Policy.OPA = opa.Args{
			URL:       &xnet.URL{},
			AuthToken: "",
		}
	case "31":
		// V31 -> V32
		cfg.Notify.NSQ = make(map[string]target.NSQArgs)
		cfg.Notify.NSQ["1"] = target.NSQArgs{}
	}

	case config.PolicyOPASubSys:
		// In case legacy OPA config is being set, we treat it as if the
		// AuthZPlugin is being set.
		subSys = config.PolicyPluginSubSys
		fallthrough
	case config.PolicyPluginSubSys:
		if ppargs, err := polplugin.LookupConfig(s, GetDefaultConnSettings(), xhttp.DrainBody); err != nil {
			return err
		} else if ppargs.URL == nil {
			// Check if legacy opa is configured.

			} else {
				authZInit = true
			}
			if authZPluginCfg.URL == nil {
				opaCfg, err := opa.LookupConfig(s[config.PolicyOPASubSys][config.Default],
					NewHTTPTransport(), xhttp.DrainBody)
				if err != nil {
					iamLogIf(ctx, fmt.Errorf("Unable to initialize AuthZPlugin from legacy OPA config: %w", err))
				} else {
					authZPluginCfg.URL = opaCfg.URL
					authZPluginCfg.AuthToken = opaCfg.AuthToken

- github.com/moby/sys/sequential: [v0.5.0](https://github.com/moby/sys/tree/sequential/v0.5.0)
- github.com/open-policy-agent/opa: [v0.67.1](https://github.com/open-policy-agent/opa/tree/v0.67.1)
- github.com/pelletier/go-toml: [v1.9.5](https://github.com/pelletier/go-toml/tree/v1.9.5)
- github.com/rcrowley/go-metrics: [10cdbea](https://github.com/rcrowley/go-metrics/tree/10cdbea)