Fixes:
- oxcical: repair import of ICAL recurrences being 60x longer than projected
- oxcical: rerecognize busy status type "OOF"
- mapi_lib: cease emission of InTransitMessageCorrelator property to RFC5322 header as garbage / stop emitting non-string PS_INTERNET_HEADERS properties completely.
- imap/pop3: resolve dlname type mismatch warnings
- email_lib: fix infinite loop in
ical_check_empty_line - midb: fix nullptr deref when startup has aborted
- http: fix double free when startup has aborted
Enhancements:
- emsmdb: add log messages for failed delegate lookup
- exchange2grommunio: replace PIPESTATUS test by something workable
- zcore: allow setting Out Of Office status of other mailboxes