not send the `Expect: continue` request header.
 *  Fix: Do not count web sockets toward the dispatcher's per-host connection
    limit.
 *  Fix: Avoid using invalid HTTPS sessions. This prevents OkHttp from crashing
    with the error, `Unexpected TLS version: NONE`.
 *  Fix: Don't corrupt the response cache when a 304 (Not Modified) response
    overrides the stored "Content-Encoding" header.

/**
 * Runs a MockWebServer on localhost and uses it as the backend to receive an OAuth session.
 *
 * <p>Clients should call {@link #start}, {@link #newAuthorizeUrl} and {@link #close} in that order.
 * Clients may request multiple sessions.
 */
public final class OAuthSessionFactory extends Dispatcher implements Closeable {
  private final SecureRandom secureRandom = new SecureRandom();

  private final SlackApi slackApi;

 *  Fix: Don't leak connections when using ALPN on the desktop.
 *  Fix: Update Jetty ALPN to `7.1.2.v20141202` (Java 7) and `8.1.2.v20141202` (Java 8).
    This fixes a bug in resumed TLS sessions where the wrong protocol could be
    selected.
 *  Fix: Don't crash in SPDY and HTTP/2 when disconnecting before connecting.
 *  Fix: Avoid a reverse DNS-lookup for a numeric proxy address

    // Force reuse. This appears flaky (30% of the time) even though sessions are reused.
    // javax.net.ssl.SSLHandshakeException: No new session is allowed and no existing
    // session can be resumed
    //
    // Report https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8264944
    // Sessions improvement https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8245576