haskellPackages.snap-server: patch for network >= 3.0

[jerith666]

Motivation for this change

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• 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 nix-review --run "nix-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)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

Notify maintainers

cc @peti

patches are from snapframework/snap-server#126

[cdepillabout]

@jerith666 Sorry I missed this earlier, but could you rebase this PR on the haskell-updates branch?

[turboMaCk]

thanks for this @jerith666 I was about to do this myself so you saved me some time:D

I can confirm this builds fine for me on nixos and that it fixes broken build of elmPackages.elm.

[jerith666]

comments added and rebased

[jonringer]

there's a conflict, please rebase

git pull -r origin master

[jerith666]

rebased to resolve the conflict & force-pushed

[cdepillabout]

@jerith666 Thanks for working with us on fixing this up.

Looks good. I've tested that haskellPackages.snap-server now builds, so I am merging this in. This should be available on master when peti merges in #75857.