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

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux_amd64.go#L369: 	SO_PEERGROUPS                    = 0x3b

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