[Spamassassin Wiki] Update of "ClamAVPlugin" by JustinMason

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The following page has been changed by JustinMason:
http://wiki.apache.org/spamassassin/ClamAVPlugin

The comment on the change is:
thx to Jonas Eckerman for this tip; add X-Spam-Virus as a metadatum

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    }
    $permsgstatus->{main}->{conf}->{headers_spam}->{"Virus"} = $header;
    $permsgstatus->{main}->{conf}->{headers_ham}->{"Virus"} = $header;
+   # add a metadatum so that rules can match against the result too
+   $permsgstatus->{msg}->put_metadata('X-Spam-Virus',$header);
    return $isspam;
  }