openmptcprouter-feeds/luci-app-shutdown/root/usr/share/rpcd/acl.d/luci-app-shutdown.json

{
    "luci-app-shutdown": {
	"description": "Allow shutdown the device",
	"read": {
	    "file": {
		"/sbin/poweroff": [ "exec" ]
	    },
	    "ubus": {
		"file": [ "exec" ]
	    }
	}
    }
}