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 Precise Pangolin (12.04) support
* Add Ubuntu Zesty Zapus (17.04) support
* Add Debian Buster support
=== milter core
==== Improvements
* binding ruby: Update bundled ruby-gnome2 to 3.1.1
=== milter manager
* Support auto detection for ((<Rmilter|URL:https://rspamd.com/rmilter/>)) (experimental)
* Rmilter has been obsolete since Rspamd 1.6, use ((<Rspamd proxy|URL:https://rspamd.com/doc/workers/rspamd_proxy.html>))
* Support auto detection for ((<Rspamd proxy|URL:https://rspamd.com/doc/workers/rspamd_proxy.html>)) (experimental)
