Add domain name to the list of host addresses

Objective
Temporary workaround until the following issue is fixed #245990: HTTP request testing unreliable and may be undesirable.

Note
This how-to handbook is for absolute beginners. If you consider yourself as an advanced user go to http://drupal.org/node/811406

Requirements
*Drupal 5 or 6
*Webmin 1.510
*Ubuntu 8.0.4 LTS server
*Full ROOT access. This usually doesn't work on shared hosting.

Steps
*Log-in Webmin.
*Navigate to Webmin > Networking > Network Configuration
*Click on Host Addresses icon.

*Click on 127.0.0.1 IP address.

*In Hostnames add your domain name at the bottom. You can add as many as you want. But only one domain name per line. Click on screenshoot to clarify.

*Click on Save button. That's it you're done. No need to restart Webmin or your server.
*To test go to your Drupal site at admin/reports/status. The error message should be gone.

Source: http://drupal.org/node/245990#comment-2741464
Thanks to l0xin