Allow users to pass a custom IPRESOLVE cURL option.

[dcr-stripe]

r? @richardm-stripe

Summary

Allow users to pass a custom IPRESOLVE cURL option. Note: Stripe API currently only supports IPv4.

$optionsArray = [\CURLOPT_IPRESOLVE => \CURL_IPRESOLVE_WHATEVER];
$client = new CurlClient($optionsArray);

This lets users pass IPRESOLVE_WHATEVER if they are proxying to Stripe through an IPv6 proxy or some other approach rather than connecting directly.

Motivation

#1046 (comment)

[miyurusankalpa]

Can this be mentioned on the README please.

I am running a IPv6 only setup, with a proxy to talk to IPv4 only endpoints such as Stripe and ran into this issue.

Also this also breaks DNS64 setups as well. which are used on AWS IPv6 only VPCs.

[miyurusankalpa]

@GouravSingh2580

You need to ask your question here. aws/containers-roadmap#835 (comment)

To force DNS64 add the following, till this is reverted.

$optionsArray = [\CURLOPT_IPRESOLVE => \CURL_IPRESOLVE_V6];
$client = new CurlClient($optionsArray);

[GouravSingh2580]

Thank you! @miyurusankalpa 🙌