}
		bsl.WriteString(enc)
		changed = true
	}
	if !changed {
		return ppath
	}
	return bsl.String()
}

// v3UnderscoreCodes maps from a character that supports an underscore
// encoding to the underscore encoding character.
var v3UnderscoreCodes = map[byte]byte{
	'_': '_',
	'.': '0',
	'/': '1',
	'*': '2',
	',': '3',
	'{': '4',
	'}': '5',
	'[': '6',
	']': '7',