Review ipv6 support

[alxbl]

• Typhoon is running with ipv6 support
• There are strange interactions between Gluetun's DNS and dotnet workloads. Seems to go away when ipv6 is disabled on the host
• Disabling ipv6 breaks kubeapi for workloads because they try to reach it at [::1]

Ideally I want IPv6 enabled and DNS over Gluetun working with .NET workloads. Disabling and re-enabling seems to fix the issue for a time (likely because of DNS caching)