I ran into an issue when I had clan + this module:
ce61f71680/nixos/mixins/mdns.nix (L6)
they both set the same config value, but clan uses "yes" and that module
uses `true`. systemd allows for "yes" or `true` (`man systemd.syntax`),
so I opted to change this to `true`.
Here's the full error:
```
error: The option `systemd.network.networks."99-ethernet-default-dhcp".networkConfig.MulticastDNS' has conflicting definition values:
- In `/nix/store/3yv22nq7rqd0ra30qvzc2d624rwa6h7c-source/nixosModules/clanCore/networking.nix': "yes"
- In `/nix/store/ivjk0r776mxal8v7jamwsrn4yidvg0dv-source/nixos/mixins/mdns.nix': true
Use `lib.mkForce value` or `lib.mkDefault value` to change the priority on any of these definitions.
```
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