milter manager

A bug fix release of 1.5.1.

We recommend development version users who use a milter that uses
NO_REPLY_* or milter-greylist 4.3.x upgrade to this version.

=== Document

==== Improvements

* Created ((<available milters|available-milters>)) list.
* Updated recommended milter-greylist configuration.

=== milter manager

==== Improvements

* Supported S25R ((<whitelist customize
|"doc/configuration.rd#s25r.add_whitelist">)) and
((<blacklist
customize|"doc/configuration.rd#s25r.add_whitelist">)).

=== milter-manager-log-analyzer

==== Improvements

* Supported milter-greylist 4.3.x.

=== milter-toolkit

==== Improvements

* Used inet_pton()/inet_pton() instead of
inet_aton()/inet_ntoa(). [Suggested by SATOH Fumiyasu]

=== Thanks

* SATOH Fumiyasu
* ROSSO