HAVE_NETINET_IN_H as guard around header

[diplfranzhoepfinger]

Hi,

it does not make sense to have this in a config.h, and then still include it when HAVE_NETINET_IN_H is 0.

This fix solves this.

[cla-bot]

We require contributors to sign our Contributor License Agreement. In order for us to review and merge your code, please fill https://forms.gle/5635zjphDo5JEJQSA to get added. Your document will be manually checked by the maintainer. Be patient...

[mhei]

Yes, the changes make sense. But I'd prefer to have them all in a single commit. And please use a more verbose description instead of just "update ...". You can re-use the wording of the PR itself for example.

[cla-bot]

We require contributors to sign our Contributor License Agreement. In order for us to review and merge your code, please fill https://forms.gle/5635zjphDo5JEJQSA to get added. Your document will be manually checked by the maintainer. Be patient...

[diplfranzhoepfinger]

Yes, the changes make sense. But I'd prefer to have them all in a single commit. And please use a more verbose description instead of just "update ...". You can re-use the wording of the PR itself for example.

DONE

[stephane]

Thank you @diplfranzhoepfinger (no need for CLA for such small changes).