New socket_wrapper release with fd-passing support

This is a continuation to my previous post on socket_wrapper project. There I mentioned about some upcoming improvements/feature additions to the project. Yes, it has been a while but we have achieved a great milestone. With some modifications to the initial design we now have basic support for fd-passing which was crucial for Samba project to test SMB3 Multichannel feature in its selftest environment. This article briefly tries to explain the approach used to implement fd-passing support inside socket_wrapper. I would suggest readers to go through my initial article on socket_wrapper project itself so that next few paragraphs make more sense.

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