Allow set CurlLite option to Null

[antonvovchenko]

Even if option not supported we can allow set it to Null. It required for compatibility with Guzzle library - https://github.com/guzzle/guzzle/blob/master/src/Handler/CurlFactory.php#L77 .

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[antonvovchenko]

I signed it!

On Wed, Jul 13, 2016 at 8:21 PM, googlebot [email protected] wrote:

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ https://cla.developers.google.com/ to sign.

Once you've signed, please reply here (e.g. I signed it!) and we'll

verify. Thanks.

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data https://cla.developers.google.com/clas and verify that your email is set on your git commits https://help.github.com/articles/setting-your-email-in-git/.
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Thanks, Anton Vovchenko

[googlebot]

CLAs look good, thanks!