siege: 3.0.8 -> 4.0.1

[danbst]

Things done

• Tested using sandboxing
  (nix.useSandbox on NixOS,
  or option build-use-sandbox in nix.conf
  on non-NixOS)
• Built on platform(s)
  • NixOS
  • OS X
  • Linux
• 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/)
• Fits CONTRIBUTING.md.

---

Bump siege version after build was fixed (#15038).

[mention-bot]

By analyzing the blame information on this pull request, we identified @7c6f434c, @joachifm and @ocharles to be potential reviewers

[joachifm]

Thank you