const golang.org/x/sys/unix.IPV6_ADDR_PREFERENCES

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux.go#L1585: 	IPV6_ADDR_PREFERENCES                       = 0x48

The pages are generated with Golds v0.7.6. (GOOS=linux GOARCH=amd64)