pkg net/http, const StatusNetworkAuthenticationRequired ideal-int
pkg net/http, const StatusPreconditionRequired = 428
pkg net/http, const StatusPreconditionRequired ideal-int
pkg net/http, const StatusRequestHeaderFieldsTooLarge = 431
pkg net/http, const StatusRequestHeaderFieldsTooLarge ideal-int
pkg net/http, const StatusTooManyRequests = 429
pkg net/http, const StatusTooManyRequests ideal-int
pkg net/http, const StatusUnavailableForLegalReasons = 451

 *  Fix: Defer proxy selection until a proxy is required. This saves calls to `ProxySelector` on
    calls that use a pooled connection.


## Version 4.3.1

_2020-01-07_

 *  Fix: Don't crash with a `NullPointerException` when a web socket is closed before it connects.
    This regression was introduced in OkHttp 4.3.0.

    checkInitialCapacity(2, 7, 4);
    checkInitialCapacity(2, 8, 4);

    checkInitialCapacity(4, 0, 1);
    checkInitialCapacity(4, 1, 1);
    checkInitialCapacity(4, 2, 1);
    checkInitialCapacity(4, 3, 1);
    checkInitialCapacity(4, 4, 1);
    checkInitialCapacity(4, 5, 2);
    checkInitialCapacity(4, 6, 2);
    checkInitialCapacity(4, 7, 2);
    checkInitialCapacity(4, 8, 2);
  }

    checkInitialCapacity(2, 7, 4);
    checkInitialCapacity(2, 8, 4);

    checkInitialCapacity(4, 0, 1);
    checkInitialCapacity(4, 1, 1);
    checkInitialCapacity(4, 2, 1);
    checkInitialCapacity(4, 3, 1);
    checkInitialCapacity(4, 4, 1);
    checkInitialCapacity(4, 5, 2);
    checkInitialCapacity(4, 6, 2);
    checkInitialCapacity(4, 7, 2);
    checkInitialCapacity(4, 8, 2);
  }