Pigeonhole v0.5.9 released

Hi all!

We are pleased to release v0.5.9 of Pigeonhole. Please find it from locations below

Aki Tuomi Open-Xchange oy

https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.9.tar... https://pigeonhole.dovecot.org/releases/2.3/dovecot-2.3-pigeonhole-0.5.9.tar... Binary packages in https://repo.dovecot.org/ Docker images in https://hub.docker.com/r/dovecot/dovecot

• Added events for Sieve and ManageSieve, see https://doc.dovecot.org/admin_manual/list_of_events/#pigeonhole
• Pigeonhole: Implement the Sieve "special-use" extension described in RFC 8579.

• duplicate: Test only compared the handles which would cause different values to be cached as the same duplicate test. Fix to also compare the actual hashes.
• imap_sieve_filter: IMAP FILTER Command had various bugs in error handling. Errors may have been duplicated for each email, errors may have been missing entirely, command tag and ERRORS/WARNINGS parameters were swapped.