const compress/flate.lengthShift

4 uses

	compress/flate (current package)
		token.go#L11: 	lengthShift = 22
		token.go#L12: 	offsetMask  = 1<<lengthShift - 1
		token.go#L75: 	return token(matchType + xlength<<lengthShift + xoffset)
		token.go#L84: func (t token) length() uint32 { return uint32((t - matchType) >> lengthShift) }