Very useful to show that debugging is enabled and what version of pigeonhole is actually running.

By Timo Sirainen.

Added LIBDOVECOT_STORAGE to library dependencies in src/lib-sieve/Makefile.am.

lib-sieve: vacation extension: Fixed determination of From: address for when sieve_vacation_dont_check_recipient is active.

Apparently automakes in future won't support configure.in anymore.

lib-sieve: vnd.dovecot.duplicate extension: Only track duplicate when Sieve script executes successfully.

Forgot to initialize variable, causing a segfault at runtime.

It is now possible to track duplicates based on arbitrary headers or even arbitrary string values using the new :header and :value arguments respectively.
The experation time can be configured using the new :seconds argument.
This change is backwards compatible as long as the name argument wasn't used. This is now a :handle <handle> argument.

Forgot to skip line upon error.

Added means to log user errors/warnings as info in master log.
Previous change was inadequate because an error was still logged.

Prevents administrator frustration about useless log messages caused by users with too much mail.

lib-sieve: include extension: didn't get semantics of mixing optional and non-optional includes for the same script quite right.

Change backported from Pigeonhole v0.4 tree, which means that this change will duplicate there upon merge.

Added support for the :optional tag of the include command.
Changed Sieve script API in the process; opening the script is now available as a separate step.