programmers documentation
other antivir support
DONT_QUARANTINE=...
scan_over is deprecated
----
CLAM bugs:
  clamd don't close connections
  clamd shutdowns on high usage (or on special mail?)
  clamscan --mbox - < FILE ...vs... clamscan --mbox FILE
    Any of them sometimes return no viruses found.
    Under one user return viruses one combination and under another
    second.
