Log Message:
Update milter-manager to 1.6.8.

== [release-1-6-8] 1.6.8: 2011-04-15

A bug fix release of 1.6.7.

=== All

==== Improvements

  * Don't create needless directories on install.
    [Reported by OBATA Akio]

=== Document

==== Improvements

  * Changed target CentOS version to 5.6.

==== Fixes

  * Fixed wrong internal links.

=== milter-manager

==== Improvements

  * Added
    \ 
((<manager.event_loop_created|configuration.rd#manager.event_loop_created> \ 
))
    configuration item.

=== Ruby milter

==== Improvements

  * Added
    \ 
((<milter.event_loop_created|ruby-milter-configuration.rd#milter.event_loop_c \ 
reated>))
    configuration item.
  * Added Milter::ClientSession#worker_id.
  * Added Milter::ClientSession#[].

=== milter-core

==== Improvements

  * Followed the Sendmail behavior rather than Postfix
    behavior on adding a header.

=== milter-server

==== Improvements

  * Don't require Ruby's header files until they are needed.

==== Fixes

  * Fixed a bug that milter-test-server can't be detected.