Restore support for "Override local DNS" #2438
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Tailscale allows to override the local DNS settings of a node via
"Override local DNS" [1]. Restore this flag with the same config setting
name `dns.override_local_dns` but disable it by default to align it with
Tailscale's default behaviour.
Tested with Tailscale 1.80.2 and systemd-resolved on Debian 12.
With `dns.override_local_dns: false`:
```
Link 12 (tailscale0)
Current Scopes: DNS
Protocols: -DefaultRoute -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
DNS Servers: 100.100.100.100
DNS Domain: tn.example.com ~0.e.1.a.c.5.1.1.a.7.d.f.ip6.arpa [snip]
```
With `dns.override_local_dns: true`:
```
Link 12 (tailscale0)
Current Scopes: DNS
Protocols: +DefaultRoute -LLMNR -mDNS -DNSOverTLS DNSSEC=no/unsupported
DNS Servers: 100.100.100.100
DNS Domain: tn.example.com ~.
```
[1] https://tailscale.com/kb/1054/dns#override-local-dns
Fixes: juanfont#2256
nblock
requested review from
ohdearaugustin,
juanfont and
kradalby
as code owners
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Tailscale allows to override the local DNS settings of a node via "Override local DNS" [1]. Restore this flag with the same config setting name
dns.override_local_dnsbut disable it by default to align it with Tailscale's default behaviour.Tested with Tailscale 1.80.2 and systemd-resolved on Debian 12.
With
dns.override_local_dns: false:With
dns.override_local_dns: true:[1] https://tailscale.com/kb/1054/dns#override-local-dns
Fixes: #2256