nmap: lua scripting support is optional

[illegalprime]

Motivation for this change

adds the ability to disable lua support in nmap, this is useful when lua cross-compilation isn't working, and to produce smaller static binaries of nmap.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.

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[teto]

Is cross-building lua fixable ? do you have an example/command where it fails ?

[Mic92]

I think fixing lua cross-compiling is orthogonal to this issue. Having a smaller nmap sounds reasonable to me.

[illegalprime]

@teto not sure, haven't looked into it yet. it probably is though

[teto]

Not like I would have had the time to fix it but would have been interesting to get some knowledge on how bad it is. Hopefully someone else needs it and fixes it :D