Use sieve_vacation_send_from_recipient to enable this behavior.
Documentation in doc/extensions/vacation.txt is updated.

The attribute type code data was allocated on the stack rather than statically, causing the returned stream to point to invalid data.

Bug whould occur when modifier was used and the value became "" at some point. In that case not all operands (modifiers) were read, causing the subsequent operation to start at an erroneous position.

Messed up signed/unsigned characters.

Patches by Timo Sirainen.

Patch by Timo Sirainen (modified).

Mixed up pre-existing boolean once parameter with new flags parameter. This probably
means that :optional partially implied :once for previous revisions.

Patch by Timo Sirainen (modified).

Patch by Timo Sirainen.

Fixes issue for GNU/Hurd.

Modified patch by Andriy Syrovenko.

Patch by Timo Sirainen.

This change is bigger than I would have liked, so this needs to be tested more.

Emerged when Sieve and ManageSieve were merged into Pigeonhole.

The output from the script service was never read, causing a broken pipe error at the script service.
Apparently, this was broken since the I/O handling for extprograms was last revised.