Find a replacement to the deprecated libnetfilter_queue API

[misje]

The current API appears to be deprecated. What can be used instead? I imagine a new API is aimed to work with nftables.

[misje]

According to this e-mail replacement APIs are listed in

• Verdict helpers
• Config helpers
• Netlink message helper functions

[misje]

Maybe this example is helpful in replacing the API.

[i336]

See also https://netfilter.vger.kernel.narkive.com/fcISKRoK/nf-queue-c-as-an-example-of-libnetfilter-queue

(I have no idea what this repo is or does (!!) - I found this issue page amongst some other google search results while deep-diving doing some figuring-out of my own.) [Edit: Ah, a neat idea, and a cool use of netfilter too.]