Fix
* IMAP: Don’t allow APPEND to specify INTERNALDATE more than 2 hours
into future. With Maildir future INTERNALDATEs may mess up
incremental backups.
- Date: header was always being added to cache file when saving
messages, even if clients didn’t really want it. This caused
POP3-only users to have dovecot.index.cache file unneededly.
- Character set conversion in specific mails may have caused Dovecot
to allocate all the available memory (in default configuration dying
after having allocated 256 MB). This happened only while searching
messages.
- Message address parser didn’t handle empty group:; correctly.
- imap/pop3-login: Don’t crash when shutting down and destroying
clients.
- deliver wasn’t using mail_access_groups setting.
- mbox: When doing autodetection, if mbox didn’t find an existing mail
directory it just went and created it anyway, instead of failing the
storage creation.
- Fixed some error handling in maildir and index code.
