2004.07.15  silfreed
  - changed name from 'maillogfilter' to 'maillogstats'

2004.06.23 dwarner
  updated imap connection logging

2004.03.30 dwarner
  added `connect` column to table
  renamed `postfix` table to `stats`
  add support for imap/postfix/tpop3d connections

2003.07.03 dwarner
  'from=<' counts too many things for Received; trying 'message-id=<' instead

2002.11.21 dwarner
  wrap counters manually by doing this:
    if ($i > pow(2, 31)) { $i = $i - pow(2,31); }
  add mailscanner processing
  OutputCounters()
    - change to a 'REPLACE INTO'

