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

one use

	golang.org/x/sys/unix (current package)
		zerrors_linux_amd64.go#L364: 	SO_PASSPIDFD                     = 0x4c

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