func Debug(v ...interface{}) {
	if debugLogEnabled {
		log.Print(v...)
	}
}
Debug is the wrapper of the standard log.Debug, but printed only when the debug log is enabled.
package log
import "log"
var debugLogEnabled bool
func EnableDebugLog(enable bool) {
	debugLogEnabled = enable
}
func DebugLogEnabled() bool {
	return debugLogEnabled
}
func Debugf(format string, v ...interface{}) {
	if debugLogEnabled {
		log.Printf(format, v...)
	}
}