nixos: nginx.resolver.ipv6 defaults to true even if networking.enableIPv6 is false

[Fuuzetsu]

Describe the bug

nginx.resolver.ipv6 setting in nginx NixOS module is always set to true by default even if IPv6 is disabled on the networking level.

This then can give pretty cryptic and intermittent failures when using it for proxying or whatever else.

Steps To Reproduce

Steps to reproduce the behavior:

Set networking.enableIPv6 = false. Set something in services.nginx.resolver.addresses. Check the generated nginx config and note that it doesn't add ipv6=off to resolver line.

Expected behavior

It should probably ipv6=off automatically, especially as we already have the enableIPv6 value visible in the module and used for other stuff.

Metadata

I'm on

      url = "https://github.com/NixOS/nixpkgs/archive/5ae933ec0d684e382ee12971de262583524e4538.tar.gz";

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[SuperSandro2000]

#368055