cfg.HSTSPreload = hstsPreload

	referrerPolicy := env.Get(EnvBrowserReferrerPolicy, kvs.GetWithDefault(browserReferrerPolicy, DefaultKVS))
	switch referrerPolicy {
	case "no-referrer", "no-referrer-when-downgrade", "origin", "origin-when-cross-origin", "same-origin", "strict-origin", "strict-origin-when-cross-origin", "unsafe-url":
		cfg.ReferrerPolicy = referrerPolicy
	default:

		case madmin.AdminAPIVersion:
			desc = fmt.Sprintf("This 'admin' API is not supported by server in '%s'", getMinioMode())
		default:
			desc = fmt.Sprintf("Unexpected client 'admin' API version found '%s', expected '%s', please downgrade the client to older releases", version, madmin.AdminAPIVersion)
		}
		writeErrorResponseJSON(r.Context(), w, APIError{
			Code:           "XMinioAdminVersionMismatch",
			Description:    desc,

    private ReferrerPolicyValues() {}

    public static final String NO_REFERRER = "no-referrer";
    public static final String NO_REFFERER_WHEN_DOWNGRADE = "no-referrer-when-downgrade";
    public static final String SAME_ORIGIN = "same-origin";
    public static final String ORIGIN = "origin";
    public static final String STRICT_ORIGIN = "strict-origin";

    `CUDA_ERROR_ILLEGAL_ADDRESS` failures.

    A fix in CUDA 9.1.121 is expected in late February 2018. We do not expect a
    fix for CUDA 9.0.x. Until the fix is available, the only workaround is to
    [downgrade](https://developer.nvidia.com/cuda-toolkit-archive) to CUDA 8.0.x
    or disable XLA:GPU.

    TensorFlow will print a warning if you use XLA:GPU with a known-bad version

  This feature will not be fully enabled until a future Kubernetes release (likely to be v1.29), but is added in v1.28 to enable
  safe rollback on downgrade. ([#118339](https://github.com/kubernetes/kubernetes/pull/118339), [@jpbetz](https://github.com/jpbetz)) [SIG API Machinery, Auth, Cloud Provider and Testing]

        "ReadWriteC -> ReadWriteA",
        "ReadWriteB -> ReadWriteC",
        "ReadWriteA -> ReadWriteB");
  }

  public void testWriteToReadLockDowngrading() {
    writeLockA.lock(); // writeLockA downgrades to readLockA
    readLockA.lock();
    writeLockA.unlock();

    lockB.lock(); // readLockA -> lockB
    readLockA.unlock();

    // lockB -> writeLockA should fail

        "ReadWriteC -> ReadWriteA",
        "ReadWriteB -> ReadWriteC",
        "ReadWriteA -> ReadWriteB");
  }

  public void testWriteToReadLockDowngrading() {
    writeLockA.lock(); // writeLockA downgrades to readLockA
    readLockA.lock();
    writeLockA.unlock();

    lockB.lock(); // readLockA -> lockB
    readLockA.unlock();

    // lockB -> writeLockA should fail

				if !ok {
					ckvs.Set(kv.Key, kv.Value)
				}
			}
			if _, ok := cp[subSys]; !ok {
				rnSubSys, ok := renamedSubsys[subSys]
				if !ok {
					// A config subsystem was removed or server was downgraded.
					continue
				}
				// Copy over settings from previous sub-system
				// to newly renamed sub-system
				for _, kv := range cp[rnSubSys][Default] {
					_, ok := c[subSys][tgt].Lookup(kv.Key)

	// Current version being written.
	xlVersionCurrent [4]byte
)

const (
	// Breaking changes.
	// Newer versions cannot be read by older software.
	// This will prevent downgrades to incompatible versions.
	xlVersionMajor = 1

	// Non breaking changes.
	// Bumping this is informational, but should be done
	// if any change is made to the data stored, bumping this

//go:generate stringer -type VersionType,ErasureAlgo -output=xl-storage-format-v2_string.go $GOFILE

const (
	// Breaking changes.
	// Newer versions cannot be read by older software.
	// This will prevent downgrades to incompatible versions.
	xlVersionMajor = 1

	// Non breaking changes.
	// Bumping this is informational, but should be done
	// if any change is made to the data stored, bumping this