Update

vendor/tailscale.com/net/dns/dns_clone.go

@@ -0,0 +1,74 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Code generated by tailscale.com/cmd/cloner; DO NOT EDIT.
+
+package dns
+
+import (
+	"net/netip"
+
+	"tailscale.com/types/dnstype"
+	"tailscale.com/util/dnsname"
+)
+
+// Clone makes a deep copy of Config.
+// The result aliases no memory with the original.
+func (src *Config) Clone() *Config {
+	if src == nil {
+		return nil
+	}
+	dst := new(Config)
+	*dst = *src
+	if src.DefaultResolvers != nil {
+		dst.DefaultResolvers = make([]*dnstype.Resolver, len(src.DefaultResolvers))
+		for i := range dst.DefaultResolvers {
+			if src.DefaultResolvers[i] == nil {
+				dst.DefaultResolvers[i] = nil
+			} else {
+				dst.DefaultResolvers[i] = src.DefaultResolvers[i].Clone()
+			}
+		}
+	}
+	if dst.Routes != nil {
+		dst.Routes = map[dnsname.FQDN][]*dnstype.Resolver{}
+		for k := range src.Routes {
+			dst.Routes[k] = append([]*dnstype.Resolver{}, src.Routes[k]...)
+		}
+	}
+	dst.SearchDomains = append(src.SearchDomains[:0:0], src.SearchDomains...)
+	if dst.Hosts != nil {
+		dst.Hosts = map[dnsname.FQDN][]netip.Addr{}
+		for k := range src.Hosts {
+			dst.Hosts[k] = append([]netip.Addr{}, src.Hosts[k]...)
+		}
+	}
+	return dst
+}
+
+// A compilation failure here means this code must be regenerated, with the command at the top of this file.
+var _ConfigCloneNeedsRegeneration = Config(struct {
+	DefaultResolvers []*dnstype.Resolver
+	Routes           map[dnsname.FQDN][]*dnstype.Resolver
+	SearchDomains    []dnsname.FQDN
+	Hosts            map[dnsname.FQDN][]netip.Addr
+	OnlyIPv6         bool
+}{})
+
+// Clone duplicates src into dst and reports whether it succeeded.
+// To succeed, <src, dst> must be of types <*T, *T> or <*T, **T>,
+// where T is one of Config.
+func Clone(dst, src any) bool {
+	switch src := src.(type) {
+	case *Config:
+		switch dst := dst.(type) {
+		case *Config:
+			*dst = *src.Clone()
+			return true
+		case **Config:
+			*dst = src.Clone()
+			return true
+		}
+	}
+	return false
+}