- Add --tls-curve-preferences flag for configuring TLS key exchange mechanism ([#137115](https://github.com/kubernetes/kubernetes/pull/137115), [@damdo](https://github.com/damdo)) [SIG API Machinery, Architecture, CLI, Cloud Provider, Node and Testing]

    *   Add `tf.keras.layers.AbstractRNNCell` as the preferred implementation
        for RNN cells in TF v2. User can use it to implement RNN cells with
        custom behavior.
    *   Keras training and validation curves are shown on the same plot when
        using the TensorBoard callback.
    *   Switched Keras `fit/evaluate/predict` execution to use only a single
        unified path by default unless eager execution has been explicitly