const golang.org/x/sys/unix.BPF_F_ADJ_ROOM_ENCAP_L2_ETH

one use

	golang.org/x/sys/unix (current package)
		ztypes_linux.go#L2923: 	BPF_F_ADJ_ROOM_ENCAP_L2_ETH                = 0x40

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