all: Make config.Wrapper an actual suture.Service (fixes #7451) (#7452)

cmd/strelaysrv/main.go

@@ -186,6 +186,7 @@ func main() {
 	}
 
 	wrapper := config.Wrap("config", config.New(id), id, events.NoopLogger)
+	go wrapper.Serve(context.TODO())
 	wrapper.Modify(func(cfg *config.Configuration) {
 		cfg.Options.NATLeaseM = natLease
 		cfg.Options.NATRenewalM = natRenewal

cmd/syncthing/main.go

@@ -603,9 +603,7 @@ func syncthingMain(options serveOptions) {
 		l.Warnln("Failed to initialize config:", err)
 		os.Exit(svcutil.ExitError.AsInt())
 	}
-	if cfgService, ok := cfgWrapper.(suture.Service); ok {
-		earlyService.Add(cfgService)
-	}
+	earlyService.Add(cfgWrapper)
 
 	// Candidate builds should auto upgrade. Make sure the option is set,
 	// unless we are in a build where it's disabled or the STNOUPGRADE