Add new IP to the white list
| Name | Data Type | Status | Description |
| auth-id | Integer | Required | Authentication parameter |
| auth-password | String | Required | Authentication parameter |
| id | Integer | Required | Sub user's ID |
| ip | String | Required | IP address to be added to the whitelist. |
URL JSON: https://api.cloudns.net/sub-users/add-ip.json
POST/GET: auth-id=0&auth-password=password&id=0&ip=1.2.3.5
URL XML: https://api.cloudns.net/sub-users/add-ip.xml
POST/GET: auth-id=0&auth-password=password&id=0&ip=1.2.3.5