Log Message:
Update to 2.12. From the changelog:

- Added ability for rbl plugin to capture messages before rejecting them.
- Fixed broken use of -lbg-sysdeps in modules.
- Fixed missing plugin-rbl in installed image.
- Updated for bglibs v2
- Added new "rbl" plugin, to block messages from IPs in an RBL.
- Added new "queuedir" backend, to save messages to simple files.
- Make sure plugin reset functions get called before exiting.
- Added missing plugin-starttls-ucspi to installed files.
- Added support for limiting the number of messages to plugin-counters.
- This version updates the plugin API to add new features:
  - Capabilities reported by the SMTP EHLO response can be added by
    plugins.
  - Plugins are passed any SMTP parameters given with the sender and
    recipient commands.
  - Plugins can add new commands to the SMTP protocol.
  Plugins compiled for previous versions of mailfront will not work
  without recompiling.  The short-circuit on accept logic has also been
  eliminated to fix a semantic issue.
- SMTP AUTH support has been moved into a new plugin, cvm-authenticate.
  Existing installations relying on SMTP AUTH support will need to make
  sure they are using this new plugin.  The smtpfront-qmail wrapper
  has been modified to provide this additional plugin.
- Fixed plugin-add-received to add the "IPv6:" prefix in the Received:
  header when the protocol is TCP6.
- Added plugin starttls-ucspi to implement STARTTLS using ucspi-tls.
- SMTP AUTH can now be restricted to TLS-enabled sessions.
- Added controls for pop3front-auth to limit the number of USER commands
  and authentication failures allowed per session.
- Added control to imapfront-auth to limit the number of authentication
  failures allowed per session.
- Modified the clamav plugin to use the newer INSTREAM protocol.
- imapfront-auth now sets $DOVECONF_ENV in Dovecot mode in order to
  avoid having Dovecot imapd reset it through doveconf.
- Added Lua scripting plugin (optional, build with 'make lua').
- Modified the qmail backend to evaluate $QMAILQUEUE as late as possible.
  This allows more options for changing $QMAILQUEUE in plugins.
- Added support for running Dovecot IMAP from imapfront-auth.
  See imapfront.html for details on how to set this up.
- Added support for rejecting whole messages when the recipient count is
  exceeded in plugin-counters.
- Made the check-fqdn plugin explicitly reject empty recipients.
- Added a sender domain restriction to the check-fqdn plugin.
- Added missing plugin-spamassassin.so to installation.
- Fix bug in handling invalid message numbers in retrieving messages in
  pop3front-maildir.
- Added a SpamAssassin scanning plugin.
- Optimized pop3front-maildir to avoid stat'ing each message twice, and
  to use sizes recorded in the filename to avoid stat'ing entirely.
  See pop3front.html for details on the filenames.

pkgsrc changes:

- Libtoolize to fix build on OS X.