*  Fix: Prefer TLSv1.2 where it is available. On certain older platforms it is necessary to opt-in
    to TLSv1.2.
 *  New: `Request.tag()` permits multiple tags. Use a `Class<?>` as a key to identify tags. Note
    that `tag()` now returns null if the request has no tag. Previously this would return the
    request itself.
 *  New: `Headers.Builder.addAll(Headers)`.
 *  New: `ResponseBody.create(MediaType, ByteString)`.

 * `http://ho™ail.com`. To mitigate this, the single character (™) maps to the string (tm). There
 * is similar policy for all of the 1.1 million Unicode code points. Note that some code points such
 * as "\ud83c\udf69" are not mapped and cannot be used in a hostname.
 *
 * [Punycode](http://ietf.org/rfc/rfc3492.txt) converts a Unicode string to an ASCII string to make

    val response = client.newCall(request).execute()
    assertThat(response.body.string()).isEqualTo("abc")
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)

    // Note that although we have two routes available, we only use one. The retry is permitted
    // because there are routes available, but it chooses the existing connection since it isn't
    // yet considered unhealthy.

 * ```
 *
 * Clear the connection pool with [evictAll()][ConnectionPool.evictAll]. Note that the connection
 * pool's daemon thread may not exit immediately.
 *
 * ```java
 * client.connectionPool().evictAll();
 * ```
 *
 * If your client has a cache, call [close()][Cache.close]. Note that it is an error to create calls
 * against a cache that is closed, and doing so will cause the call to crash.
 *

    assertThat(stream2.writeBytesMaximum)
      .isEqualTo(Settings.DEFAULT_INITIAL_WINDOW_SIZE.toLong())
  }

  @Test fun remoteOmitsInitialSettings() {
    // Write the mocking script. Note no SETTINGS frame is sent or acknowledged.
    peer.acceptFrame() // SYN_STREAM
    peer.sendFrame().headers(false, 3, headerEntries("a", "android"))
    peer.acceptFrame() // GOAWAY
    peer.play()