return (timeoutNanos <= 0L) ? 0L : timeoutNanos - (System.nanoTime() - startTime);
  }

  /**
   * Signals some other thread waiting on a satisfied guard, if one exists.
   *
   * <p>We manage calls to this method carefully, to signal only when necessary, but never losing a
   * signal, which is the classic problem of this kind of concurrency construct. We must signal if

	public fun <init> ()V
	public final fun build ()Lokhttp3/CacheControl;
	public final fun immutable ()Lokhttp3/CacheControl$Builder;
	public final fun maxAge (ILjava/util/concurrent/TimeUnit;)Lokhttp3/CacheControl$Builder;
	public final fun maxAge-LRDsOJo (J)Lokhttp3/CacheControl$Builder;
	public final fun maxStale (ILjava/util/concurrent/TimeUnit;)Lokhttp3/CacheControl$Builder;

     */
    public void addDocBoostMatcher(final DocBoostMatcher rule) {
        docBoostMatcherList.add(rule);
    }

    /**
     * Sets the list of crawler instances that this updater will manage.
     *
     * @param crawlerList the list of crawlers to set
     */
    public void setCrawlerList(final List<Crawler> crawlerList) {
        this.crawlerList = crawlerList;
    }

upgrading, and deleting clusters.

For the 1.8 release, SIG Cluster Lifecycle continued to focus on expanding the
capabilities of kubeadm, which is both a user-facing tool to manage clusters
and a building block for higher-level provisioning systems. Starting
with the 1.8 release, kubeadm supports a new upgrade command and includes alpha
support for self hosting the cluster control plane.

        .addHeader("Cache-Control: s-maxage=60")
        .addHeader("Cache-Control: max-age=180")
        .build(),
    )
  }

  @Test
  fun maxAgePreferredOverHigherMaxAge() {
    assertNotCached(
      MockResponse
        .Builder()
        .addHeader("Date: " + formatDate(-2, TimeUnit.MINUTES))
        .addHeader("Cache-Control: s-maxage=180")
        .addHeader("Cache-Control: max-age=60")

     * but an implemantation that encorporates the transport header(for
     * efficiency) might use a different initial bufferIndex. For example,
     * to eliminate copying data when writing NbtSession data one might
     * manage that 4 byte header specifically and therefore the initial
     * bufferIndex, and thus headerStart, would be 4).(NOTE: If one where
     * looking for a way to improve perfomance this is precisly what you

* Fix a scalability issue where high rates of event writes degraded etcd performance. ([#64539](https://github.com/kubernetes/kubernetes/pull/64539), [@ccding](https://github.com/ccding))
* Properly manage security groups for loadbalancer services on OpenStack. ([#65373](https://github.com/kubernetes/kubernetes/pull/65373), [@multi-io](https://github.com/multi-io))

  - [beta] In order to preserve safety guarantees the cluster no longer force deletes pods on un-responsive nodes and users are now warned if they try to force delete pods via the CLI. ([docs](http://kubernetes.io/docs/tasks/manage-stateful-set/scale-stateful-set/)) ([kubernetes/features#119](https://github.com/kubernetes/enhancements/issues/119))
- **Auth**

* DaemonSets [can now be updated by a rolling update](https://kubernetes.io/docs/tasks/manage-daemon/update-daemon-set).

## Action Required

### Certificates API

### CSIDriver policy for FSGroup graduates to Beta

The FSGroup's CSIDriver Policy is now beta in 1.20. This allows CSIDrivers to explicitly indicate if they want Kubernetes to manage permissions and ownership for their volumes via `fsgroup`. 

### Security Improvements for CSI Drivers (Alpha)