2004-10-03 jrandom

    * Add a new stat logging component to optionally dump the raw stats to
      disk as they are generated, rather than rely upon the summarized data.
      By default, this is off, but the router property "stat.logFilters" can
      be set to a comma delimited list of stats (e.g. "client.sendAckTime")
      which will be written to the file "stats.log" (or whatever the property
      "stat.logFile" is set to).  This can also log profile related stats,
      such as "dbResponseTime" or "tunnelTestResponseTime".