func Critf(format string, args ...interface{}) {
	if Log != nil {
		Log.Crit(fmt.Sprintf(format, args...))
	}
}
func Critf(format string, args ...interface{}) {
	if Log != nil {
		Log.Crit(fmt.Sprintf(format, args...))
	}
}
// Critf logs at the CRITICAL log level using a standard printf format string