luci/applications/luci-app-xinetd/root/usr/share/rpcd/acl.d/luci-app-xinetd.json

{
	"luci-app-xinetd": {
		"description": "Grant access to luci-app-xinetd",
		"read": {
			"file": {
				"/etc/passwd": [ "read" ]
			},
			"uci": [ "xinetd" ]
		},
		"write": {
			"uci": [ "xinetd" ]
		}
	}
}