Add share/doc/dovecot/wiki/MailboxSettings.txt to PLIST.

Bump PKGREVISION.
Note update of mail/dovecot2 package to 2.2.1nb2.
Dovecot 2.2 change API/ABI.
Update dovecot2-pigeonhole to 0.4.0.

v0.4.0 09-05-2013 Stephan Bosch <stephan@rename-it.nl>

+ Added doveadm-sieve plugin that provides the possibility to synch Sieve
  scripts using doveadm sync along with the user's mailboxes.
+ Added the Sieve extprograms plugin to the main Pigeonhole package. It is
  still a plugin, but it is now included so that a separate compile is no
  longer necessary and distributors are likely to include it. The extprograms
  plugin provides Sieve language extensions that allows executing
  (administrator-controlled) external programs for message delivery,
  message filtering and string manipulation. Refer to
  doc/plugins/sieve_extprograms.txt for more information.
+ Added debug message showing Pigeonhole version at initialization. Makes it
  very clear that the plugin is properly loaded.
+ Finished implementation of the Sieve include extension. It should now
  fully conform to RFC 6609. The main addition is the new :optional tag which
  makes the include command ignore missing included scripts without an error.
+ Finished implementation of the Sieve environment extension as much as
  possible. Environment items "location", "phase" and "domain" now also
  return a usable value.
Note update of mail/dovecot2-pigeonhole package to 0.4.0.
Stop using PKG_OPTIONS.clamav as the options variable.

In 2005, this package started using PKG_OPTIONS.clamav instead of the
expected PKG_OPTIONS.p5-Mail-ClamAV, on the theory that the options
were the same.  Now, clamav supports "milter" and
"clamav-experimental", and p5- supports "curl".  So there's no way to
build this package with the curl option, and no way to build this
package if clamav has any options set.  Therefore, the change being
committed will not bother anyone :-)  Nevertheless, bump PKGREVISION.