You're system isn't infected as the Network Shield is blocking this URL, which it considers malicious. There is a possibility that it has been hacked.
However URLVoid doesn't have it listed,
http://www.urlvoid.com/scan/rugbyfederal.com.
- There is a new on-line contact form,
http://www.avast.com/contact-form.php?loadStyles for: * Sales inquiries; Technical issues; Website issues; Report false virus alert in file;
Report false virus alert on website; Press (Media), issues.
If you are reporting an FP, then you get another input field open, enter the web URL for the site you wish to submit for review, etc.