A bug fix release of 1.6.4.
=== milter manager
* Fixed a bug that "Sendmail Compatible" applicable
condition doesn't set applicable if_addr and id_name
[Patch by Kenji Shiono]
* Fixed a crash bug that may be caused SMTP client
disconnection is detected.
[Reported by Kenji Shiono]
* Supported parsing Authentication-Results added by ENMA.
=== Ruby milter
* Supported effective user and group change.
* Kenji Shiono