This adds a new callback to the Sieve script execution environment.

It can never be NULL after the "lib-storage: Always create
mail_save_context.dest_mail" core change.

lib-sieve: file storage: Amended the up-to-date timestamp comparison for on-disk binaries to include nanoseconds.

This will fix problems occurring when both binary and script are saved within the same second.
On older systems that have no support for nanoseconds in the stat() time stamps, this has no effect.

Otherwise, the mailbox name would never match, since matching is performed case-sensitively and Dovecot only returns the upper-cased "INBOX".
This change prevents confusing administrators that for some reason choose to use a different capitalization of that mailbox name.

Use eacces_error_get(), rather than just printing "Permission denied".

Use eacces_error_get(), rather than just printing "Permission denied".

path-util is a merge of realpath from Pigeonhole and abspath from core.

This is not currently used anywhere, so nothing actually broke.
This bug was exposed by the previous commit, causing a compiler error/warning on some compilers.

Applies to LDA/LMTP context in general, not only when sieve_before/sieve_after are used.
Action side-effects and the message snapshot would be lost at the final stage where the implicit keep is evaluated.
This happened because the keep action itself is not actually executed, but rather its presence is noted to determine whether more scripts need to be executed.
So, when finally execution of the actual keep action is due, i.e. when there are no more scripts in the sequence, it overrides the explicit keep from the last script.
This didn't take the side-effects and message snapshot into account.

The situation where no headers are found was not always handled correctly.

Used the following script:

C_FILES=`git ls-files *.c`
H_FILES=`git ls-files *.h`
for F in "$C_FILES $H_FILES"; do
        echo "$F"
  perl -p -i -e 's/safe_memset\(&\(?([^,]*)\)?,\s*0,\s*sizeof\(\g1\)\)/i_zero_safe(&$1)/g' $F
  perl -p -i -e 's/safe_memset\(([^,]*),\s*0,\s*sizeof\(\*\g1\)\)/i_zero_safe($1)/g' $F
  perl -p -i -e 's/memset\(&\(?([^,]*)\)?,\s*0,\s*sizeof\(\g1\)\)/i_zero(&$1)/g' $F
  perl -p -i -e 's/memset\(([^,]*),\s*0,\s*sizeof\(\*\g1\)\)/i_zero($1)/g' $F
done

Apparently, this causes GCC warnings.

Apparently, this causes GCC warnings.

In that case a transaction (delayed sync) is perfromed outside of the context of an IMAP command.

This avoids accidents with the array numbering being wrong.

This at least partially replaces the "rawlog" post-login binary. For now
the "rawlog" binary supports some parameters, which aren't configurable
for rawlog_dir.

lib-sieve: vacation extension: Use Microsoft X-Auto-Response-Suppress header to prevent unwanted responses.

We've seen a few situations where Pigeonhole and Microsoft products start a useless machine conversation.
At least older versions of Outlook ignore the standards on multiple points to make this happen.
We prevent this now by recognizing and generating the X-Auto-Response-Suppress header.

lib-sieve: util: Removed Pigeonhole's own version of t_str_trim(), since it is now available in Dovecot.

lib-sieve: vnd.dovecot.report extension: Added Dovecot-Reporting-User field, which contains the e-mail address of the user sending the report.

Sequential exections would override a previously flagged delivery, which is wrong.
This caused the sieve_discard feature to trigger for messages that were actually delivered somewhere by an earlier script in the sequence.

The simplest case in which all normal scripts maintain the (implicit) keep action triggered an assert failure.
Fixed by restructuring the script execution loop to make it easy to understand.
Now handles each case explicitly.

lib-sieve: vnd.dovecot.report extension: Added support for configuring the "From:" address used in the report.

program_client_remote_create() is now called program_client_unix_create().