milter manager is a milter to use multiple milters effectively.
If milter manager is introduced, milter manager administrates milters instead of MTA. The has some advantages:
=== Package
==== Improvements
* Drop Ubuntu Yakkety Yak (16.10) support
* Drop Ubuntu Zesty Zapus (17.04) support
* Add Ubuntu Artful Aardvark (17.10) support
* Add Ubuntu Bionic Beaver (18.04) support
* Drop Debian Jessie support
* Update Ruby version to 2.3.5 on CentOS6
=== milter manager
==== Fixes
* Fix a bug that Rspamd auto detection failure [Reported by whyscream][GitHub #128]
=== Known issues
* We cannot use rspamd_proxy as a child milter of milter-manager [GitHub #134]
=== Thanks
* whyscream
