implemented some of modulitos' review proposals

main.go

@@ -86,7 +86,7 @@ func main() {
 
 	debug := flag.Bool("enable-debugging-handlers", false, "Enable debugging handlers. Currently /debug/alpha/cache is supported")
 
-	saLookupGracePeriod := flag.Duration("service-account-lookup-grace-period", 100*time.Millisecond, "The grace period for service account to be available in cache before not mutating a pod. Defaults to 100ms. Set to 0 to deactivate waiting. Carefully use higher values as it may have significant impact on Kubernetes' pod scheduling performance.")
+	saLookupGracePeriod := flag.Duration("service-account-lookup-grace-period", 0, "The grace period for service account to be available in cache before not mutating a pod. Defaults to 0, what deactivates waiting. Carefully use values higher than a bunch of milliseconds as it may have significant impact on Kubernetes' pod scheduling performance.")
 
 	klog.InitFlags(goflag.CommandLine)
 	// Add klog CommandLine flags to pflag CommandLine