func Logf(format string, val ...interface{}) error {
	return glg.out(LOG, format, val...)
}
func Logf(format string, val ...interface{}) error {
	return glg.out(LOG, format, val...)
}
func Logf ( format string , val ... interface { } ) error { return glg . out ( LOG , format , val ... ) }
// Logf writes std log event with format
Logf writes std log event with format