*  New: Defer constructing `Inflater` and `Deflater` instances until they are needed. This saves
    memory if web socket compression is negotiated but not used.


## Version 4.5.0-RC1

_2020-03-17_

**This release candidate turns on web socket compression.**

The [spec][rfc_7692] includes a sophisticated mechanism for client and server to negotiate

     * initialized by the time those parts of `<clinit>()` run. Guarded by CipherSuite.class.
     */
    private val INSTANCES = mutableMapOf<String, CipherSuite>()

    // Last updated 2016-07-03 using cipher suites from Android 24 and Java 9.

    // @JvmField val TLS_NULL_WITH_NULL_NULL = init("TLS_NULL_WITH_NULL_NULL", 0x0000)
    @JvmField val TLS_RSA_WITH_NULL_MD5 = init("SSL_RSA_WITH_NULL_MD5", 0x0001)

    when OkHttp retrieves ALPN state on a closed connection.
 *  Upgrade: [Kotlin 1.6.21][kotlin_1_6_21].
 *  Upgrade: [Okio 3.1.0][okio_3_1_0].


## Version 5.0.0-alpha.6

_2022-03-14_

 *  Fix: Don't attempt to close pooled connections. We saw occasional fast fallback calls crash in
    the previous alpha due to an unexpected race.


## Version 5.0.0-alpha.5

_2022-02-21_

        "a=b; " +
          "Expires=Thu, 01 Jan 1970 00:00:02 GMT; " +
          "Expires=Thu, 01 Jan 1970 00:00:04 GMT; " +
          "Expires=Thu, 01 Jan 1970 00:00:01 GMT; " +
          "Expires=Thu, 01 Jan 1970 00:00:03 GMT",
      )!!.expiresAt,
    ).isEqualTo(3000L)
  }

  @Test fun maxAgeOrExpiresMakesCookiePersistent() {
    assertThat(parseCookie(0L, url, "a=b")!!.persistent).isFalse()

 *  Fix: Badly-behaving caches now throw a checked exception instead of a
    `NullPointerException`.
 *  Fix: Better handling of uncaught exceptions in MockWebServer with HTTP/2.

## Version 2.3.0

_2015-03-16_

 *  **HTTP/2 support.** We've done interop testing and haven't seen any
    problems. HTTP/2 support has been a big effort and we're particularly
    thankful to Adrian Cole who has helped us to reach this milestone.

          "87d0b87e61a66ab6e2b1f651081176b18c3de3a4697044bb84fdf23a7d783ed2432f6aa3552e6a4d6894fb59" +
          "e1ece5b91fd1d53baed0de7ebd2229ea88c6b95444f81b796645f06024a5d35a0b058c0c014ef031b4e0afad" +
          "03"
      ).decodeHex()

    assertThat(okHttpCertificate.signatureValue.byteString)
      .isEqualTo(javaCertificate.signature.toByteString())

    assertThat(okHttpCertificate).isEqualTo(
      Certificate(