const compress/flate.HuffmanOnly

4 uses

	compress/flate (current package)
		deflate.go#L28: 	HuffmanOnly = -2
		deflate.go#L586: 	case level == HuffmanOnly:

	compress/gzip
		gzip.go#L23: 	HuffmanOnly        = flate.HuffmanOnly

	compress/zlib
		writer.go#L23: 	HuffmanOnly        = flate.HuffmanOnly