*  Fix: Allow interceptors to change the request method.
 *  Fix: Don’t use the request's `User-Agent` or `Proxy-Authorization` when
    connecting to an HTTPS server via an HTTP tunnel. The `Proxy-Authorization`
    header was being leaked to the origin server.
 *  Fix: Digits may be used in a URL scheme.
 *  Fix: Improve connection timeout recovery.

* Version-guard Kubectl client Guestbook application test against deployments ([#24478](https://github.com/kubernetes/kubernetes/pull/24478), [@ihmccreery](https://github.com/ihmccreery))
* Fix goroutine leak in ssh-tunnel healthcheck. ([#24487](https://github.com/kubernetes/kubernetes/pull/24487), [@cjcullen](https://github.com/cjcullen))

 * Implementations for common types can be found in {@link Funnels}.
 *
 * <p>Note that serialization of {@linkplain BloomFilter bloom filters} requires the proper
 * serialization of funnels. When possible, it is recommended that funnels be implemented as a
 * single-element enum to maintain serialization guarantees. See Effective Java (2nd Edition), Item

      implements Funnel<Iterable<? extends E>> {
    private final Funnel<E> elementFunnel;

    SequentialFunnel(Funnel<E> elementFunnel) {
      this.elementFunnel = Preconditions.checkNotNull(elementFunnel);
    }

    @Override
    public void funnel(Iterable<? extends E> from, PrimitiveSink into) {
      for (E e : from) {
        elementFunnel.funnel(e, into);
      }
    }

      implements Funnel<Iterable<? extends E>> {
    private final Funnel<E> elementFunnel;

    SequentialFunnel(Funnel<E> elementFunnel) {
      this.elementFunnel = Preconditions.checkNotNull(elementFunnel);
    }

    @Override
    public void funnel(Iterable<? extends E> from, PrimitiveSink into) {
      for (E e : from) {
        elementFunnel.funnel(e, into);
      }
    }

  }

  // Don't disconnect after building a tunnel with CONNECT
  // http://code.google.com/p/android/issues/detail?id=37221
  @Test
  fun proxyWithConnectionClose() {
    server.useHttps(handshakeCertificates.sslSocketFactory())
    server.enqueue(
      MockResponse
        .Builder()
        .inTunnel()
        .build(),
    )

      MockResponse
        .Builder()
        .code(407)
        .headers(headersOf("Proxy-Authenticate", "Basic realm=\"localhost\""))
        .inTunnel()
        .build(),
    )
    server.enqueue(
      MockResponse
        .Builder()
        .inTunnel()
        .build(),
    )
    server.enqueue(
      MockResponse(body = "response body"),
    )
    client =
      client

sight, hurrying down it.  There was not a moment to be lost:
away went Alice like the wind, and was just in time to hear it
say, as it turned a corner, `Oh my ears and whiskers, how late
it's getting!'  She was close behind it when she turned the
corner, but the Rabbit was no longer to be seen:  she found
herself in a long, low hall, which was lit up by a row of lamps
hanging from the roof.

* Allow setting the Host header in a httpGet probe ([#24292](https://github.com/kubernetes/kubernetes/pull/24292), [@errm](https://github.com/errm))
* Fix goroutine leak in ssh-tunnel healthcheck. ([#24487](https://github.com/kubernetes/kubernetes/pull/24487), [@cjcullen](https://github.com/cjcullen))

### **Cluster Lifecycle**