cmd_drweb()
  This scanner uses drweb command from DRWEB antivirus.
  
  See http://www.sald.com/, http://drweb.imshop.de/ for more info.
  
  Usage: cmd_drweb(command='/usr/local/drweb/drweb')
  
  Example: s2f(cmd_drweb('/usr/local/drweb/drweb'))