wgenginer/router/dns: use constant from golang.org/x/sys/windows

Made available in https://golang.org/cl/277153

go.mod

@@ -31,7 +31,7 @@ require (
 	golang.org/x/net v0.0.0-20201110031124-69a78807bb2b
 	golang.org/x/oauth2 v0.0.0-20200107190931-bf48bf16ab8d
 	golang.org/x/sync v0.0.0-20200625203802-6e8e738ad208
-	golang.org/x/sys v0.0.0-20201210223839-7e3030f88018
+	golang.org/x/sys v0.0.0-20201211002650-1f0c578a6b29
 	golang.org/x/term v0.0.0-20201207232118-ee85cb95a76b
 	golang.org/x/time v0.0.0-20191024005414-555d28b269f0
 	golang.org/x/tools v0.0.0-20201002184944-ecd9fd270d5d

go.sum

@@ -204,6 +204,8 @@ golang.org/x/sys v0.0.0-20201202213521-69691e467435 h1:25AvDqqB9PrNqj1FLf2/70I4W
 golang.org/x/sys v0.0.0-20201202213521-69691e467435/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20201210223839-7e3030f88018 h1:XKi8B/gRBuTZN1vU9gFsLMm6zVz5FSCDzm8JYACnjy8=
 golang.org/x/sys v0.0.0-20201210223839-7e3030f88018/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20201211002650-1f0c578a6b29 h1:hAYi5mzhvBeCfkgaIHGZ8R+Q04WjSW5ZvQO3BZ94dHY=
+golang.org/x/sys v0.0.0-20201211002650-1f0c578a6b29/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
 golang.org/x/term v0.0.0-20201207232118-ee85cb95a76b h1:a0ErnNnPKmhDyIXQvdZr+Lq8dc8xpMeqkF8y5PgQU4Q=
 golang.org/x/term v0.0.0-20201207232118-ee85cb95a76b/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=

wgengine/router/dns/registry_windows.go

@@ -18,9 +18,6 @@ import (
 	"golang.org/x/sys/windows/registry"
 )
 
-// REG_NOTIFY_CHANGE_NAME notifies the caller if a subkey is added or deleted.
-const REG_NOTIFY_CHANGE_NAME uint32 = 0x00000001
-
 func openKeyWait(k registry.Key, path string, access uint32, timeout time.Duration) (registry.Key, error) {
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
@@ -39,7 +36,7 @@ func openKeyWait(k registry.Key, path string, access uint32, timeout time.Durati
 
 		var key registry.Key
 		for {
-			err = windows.RegNotifyChangeKeyValue(windows.Handle(k), false, REG_NOTIFY_CHANGE_NAME, event, true)
+			err = windows.RegNotifyChangeKeyValue(windows.Handle(k), false, windows.REG_NOTIFY_CHANGE_NAME, event, true)
 			if err != nil {
 				return 0, fmt.Errorf("windows.RegNotifyChangeKeyValue: %v", err)
 			}