Цей middleware обробляє два типи HTTP-запитів...

### Попередні CORS-запити (preflight requests)

Це будь-які `OPTIONS` - запити, що містять заголовки `Origin` та `Access-Control-Request-Method`.

У такому випадку middleware перехопить вхідний запит і відповість відповідними CORS-заголовками, повертаючи або `200`, або `400` для інформаційних цілей.

### Прості запити

### Transition Status

Kubeadm: Automate certificate copy between control planes in HA setups

- Joining control plane nodes to a HA cluster can now be simplified by enabling the optional automatic copy of certificates from an existing control plane node.
- You can now use `kubeadm init --experimental-upload-certs` and `kubeadm join --experimental-control-plane --certificate-key`.

    // ===================================================================================
    //                                                                    Control Override
    //                                                                    ================
    @Override
    public String asTableDbName() {
        return asEsIndexType();
    }

    @Override

    // ===================================================================================
    //                                                                    Control Override
    //                                                                    ================
    @Override
    public String asTableDbName() {
        return asEsIndexType();
    }

    @Override

    // ===================================================================================
    //                                                                             Control
    //                                                                             =======

    public boolean hasAggregations() {

    protected HpSpecification _specification;

    // ===================================================================================
    //                                                                             Control
    //                                                                             =======
    @Override
    public SearchLogDbm asDBMeta() {
        return SearchLogDbm.getInstance();
    }

    @Override

    protected HpSpecification _specification;

    // ===================================================================================
    //                                                                             Control
    //                                                                             =======
    @Override
    public FileConfigDbm asDBMeta() {
        return FileConfigDbm.getInstance();
    }

    @Override

import org.apache.maven.api.annotations.NotThreadSafe;
import org.apache.maven.api.annotations.Nullable;

import static java.util.Objects.requireNonNull;

/**
 * Collects settings that control the building of effective settings.
 */
@Experimental
@Immutable
public interface SettingsBuilderRequest extends Request<ProtoSession> {

    /**
     * Gets the installation settings source.
     *

 * are choreographed via the various methods on this class.
 *
 * <p>A "lock-like object" is really any object that may be used for concurrency control. If the
 * {@link #callAndAssertBlocks} method is ever called in a test, the lock-like object must have a
 * method equivalent to {@link java.util.concurrent.locks.ReentrantLock#hasQueuedThread(Thread)}. If