[Mimedefang] Virus not being logged in version 2.39

[Bryce Rogers]

Ok, I tried this and still my log file is NOT logging when a virus is
detected. It is not even mentioned in the /var/log/maillog file.

Bryce

> There's an error in your filter:
>
>>         if ($category eq "virus") {
>>             md_graphdefang('virus',$VirusName, $RelayAddr);
>
> That should be:
>
> 		md_graphdefang_log('virus',$VirusName, $RelayAddr);