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

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux_amd64.go#L337: 	SO_BPF_EXTENSIONS                = 0x30

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