nftables is a Linux kernel firewall.

Its configuration uses a complex BNF where many keywords are repeated;
they mean different things in different places.

I want syntax highlighting and smart indentation for such files,
because they're very hard to read in just conf-mode,
even with some conf-space-keywords.

I couldn't find a major mode for this, so I wrote a basic one.
This is working well enough for today, but I don't have the time or
interest to maintain it properly.

If someone else is prepared to adopt it and get it into mainline Emacs,
that would be FANTASTIC.

Background references:

https://wiki.nftables.org
https://salsa.debian.org/pkg-netfilter-team/pkg-nftables/blob/master/src/scanner.l
https://salsa.debian.org/pkg-netfilter-team/pkg-nftables/blob/master/src/parser_bison.y
file:///usr/share/nano/nftables.nanorc
https://github.com/nfnty/vim-nftables