[Mimedefang] Any point in using File::Scan as well as clamav?

[Lucas Albers]

Scan with 4 virus scanners, if none of them find a virus then deliver the
mail.


# Scan for a virus using the first supported virus scanner we find.
Note:need to configure path of virus scanner in /usr/bin/mimedefang.pl
in mimedefang-filter

sub message_contains_virus () {
     my($code, $cat, $act);

     if ($Features{'Virus:FileScan'}) {
        ($code, $cat, $act) = message_contains_virus_filescan();
        #action_change_header("X-Virus-Scanned by FileScan");

        return (wantarray ?  ($code, $cat, $act) : $code) if $act ne "ok";
    }

     if ($Features{'Virus:FPROT'}) {
        ($code, $cat, $act) = message_contains_virus_fprot();

        #md_syslog('warning', "Running Virus Scanner FPROT");

         return (wantarray ? ($code, $cat, $act) : $code) if $act ne "ok";
     }
      if ($Features{'Virus:CLAMAV'}) {
        ($code, $cat, $act) = message_contains_virus_clamav();

        #md_syslog('warning', "Running Virus Scanner CLAMAV");
         return (wantarray ? ($code, $cat, $act) : $code) if $act ne "ok";
     }
     if ($Features{"Virus:NAI"}) {
        ($code, $cat, $act) = message_contains_virus_nai();
        #md_syslog('warning', "Running Virus Scanner Mcafee");

        return (wantarray ? ($code, $cat, $act) : $code) if $act ne "ok";
     }
     return (wantarray ? (0, 'ok', 'ok') : 0);
}