#### Type
`inconsistency` for common use cases.
`bug` for projects relying on correct DOM emissions.

#### Description
It's unclear to me if the following is a known issue or not.
Take in consideration the snippet below:
```jsx
<input type="checkbox" defaultChecked={true} />
```
#### Current Behavior
Setting the `defaultValue` prop on inputs of other types sets both the `value` and `defaultValue` attribute on the DOM element.

When setting the `defaultChecked` prop on inputs of type `checkbox` only the `checked` attribute is correctly set, leaving the `defaultChecked` attribute unchanged.

#### Expected Behaviour
Like mentioned above, the expected behavior would be for the `defaultChecked` prop to set both the `checked` and `defaultChecked` attributes on the corresponding DOM node (like it's the case with the `defaultValue` prop).

ReactDOM.render(<input type="text" defaultValue={'foo'} />, container);
    ReactDOM.render(<input type="text" defaultValue={''} />, container);
    expect(container.firstChild.defaultValue).toBe('');
  });
  it('should warn if value is null', () => {
    expect(() =>
      ReactTestUtils.renderIntoDocument(<input type="text" value={null} />),
    ).toWarnDev(
      '`value` prop on `input` should not be null. ' +
        'Consider using an empty string to clear the component or `undefined` ' +
        'for uncontrolled components.',
    );
    ReactTestUtils.renderIntoDocument(<input type="text" value={null} />);
  });
  it('should warn if checked and defaultChecked props are specified', () => {
    expect(() =>
      ReactTestUtils.renderIntoDocument(
        <input
          type="radio"
          checked={true}
          defaultChecked={true}
          readOnly={true}
        />,
      ),
    ).toWarnDev(
      'A component contains an input of type radio with both checked and defaultChecked props. ' +
        'Input elements must be either controlled or uncontrolled ' +
        '(specify either the checked prop, or the defaultChecked prop, but not ' +
        'both). Decide between using a controlled or uncontrolled input ' +
        'element and remove one of these props. More info: ' +