node --help doesn't list values for --use-largepages=...

```
$ node --help | grep -A2 -B1 use-largepages
  --use-bundled-ca            use bundled CA store (default)
  --use-largepages=...        Map the Node.js static code to large
                              pages
  --use-openssl-ca            use OpenSSL's default CA store
```
Not helpful...

For the record: the allowed values are `off`, `on` and `silent`.