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tailscale/control
Nick Khyl f62e678df8 net/dns/resolver, control/controlknobs, tailcfg: use UserDial instead of SystemDial to dial DNS servers
Now that tsdial.Dialer.UserDial has been updated to honor the configured routes
and dial external network addresses without going through Tailscale, while also being
able to dial a node/subnet router on the tailnet, we can start using UserDial to forward
DNS requests. This is primarily needed for DNS over TCP when forwarding requests
to internal DNS servers, but we also update getKnownDoHClientForProvider to use it.

Updates tailscale/corp#18725

Signed-off-by: Nick Khyl <nickk@tailscale.com>
5 months ago
..
controlbase all: use Go 1.22 range-over-int 6 months ago
controlclient tstest/integration: add more debugging, logs to catch flaky test 5 months ago
controlhttp net/netns, net/dns/resolver, etc: make netmon required in most places 5 months ago
controlknobs net/dns/resolver, control/controlknobs, tailcfg: use UserDial instead of SystemDial to dial DNS servers 5 months ago