Docs suggest to leave required field empty

[mamodom]

In the NFS docs the following is stated about the available options:

Client: Enter a single ip, host or network CIDR notation. Only one entry is allowed at the moment. You can leave it empty if you do not want network security.

However, on my omv install the field is marked as required. I did some more digging and found where it's defined as required (see here)

[votdev]

According to the docs i do not see ability to use a blank for the client. So the required flag is correct. I'll adapt the documentation.