Fixes:
- zcore: plug memory leak when address book data structure reloads
- zcore: fix inverted evaluation of RES_CONTENT::comparable
- zcore: moving messages from one store to another obtained CNs from the wrong store and could fail the operation
- oxcical: add TZID for allday events
- imap: consistently show EXISTS status before RECENT
- imap: move EXISTS/RECENT response after SEARCH result
- imap: skip reporting EXISTS/RECENT if folder is unchanged
- imap: make FETCH RFC822 report FLAGS as well
- imap: SEARCH by size used the wrong column
- imap: avoid double status reporting when one message is changed multiple times
- imap: add and populate a per-context seqid list
- midb: unbreak search matching based on dates and sizes
- imap: cease emitting extraneous FETCH FLAGS responses (works around a shortcoming in the KDE kmail client)
- imap: resolve E-1995 erroneously showing when memory use is fine
- emsmdb: avoid hitting an assertion when sort-reloading a table of a deleted folder
Enhancements:
- emsmdb: support forwarding meeting requests from organizers that are not local to the installation
- imap: broadcast changes to mailbox from EXPUNGE commands
- midb: auto-regenerate ext/ digests when missing
- Log the filename of the SQLite database when a query fails
- emsmdb: add log messages for notification queue limits