anchor.diff:      DBI
       DateTimeFormatMail
       DateTimeTimeZone
  -    DigestMD5
       Encode
       FCGI
       FileCopyRecursive
  
positive.code:     libintl_perl
  
      MHonArc
      MIMEBase64
      MIMECharset
      MIMETools
      MIMEEncWords
  
negative.code:     MailDKIM
      NetDNS
      perlldap
      libnet
      SOAPLite
    ]);
  in
  