/** Configuration key for directories to exclude from SPNEGO authentication. */
    protected static final String SPNEGO_EXCLUDE_DIRS = "spnego.exclude.dirs";

    /** Configuration key for enabling delegation in SPNEGO authentication. */
    protected static final String SPNEGO_ALLOW_DELEGATION = "spnego.allow.delegation";

    /** Configuration key for allowing localhost authentication bypass. */

rollback.
  * <strong>Automated cluster management: </strong>
     * Kubernetes clusters can now span zones within a cloud provider. Pods from a
service will be automatically spread across zones, enabling applications to
tolerate zone failure.
     * Simplified way to run a container on every node (DaemonSet API (Beta) in the
Extensions API group): Kubernetes can schedule a service (such as a logging