* store time it took to index message in DB (to find performance issues)
* ignore listserv specific files
* better examples for split_regex
* first email in mbox shouldn't contain the split string
* always lock the DB in exclusive mode
* save email within transaction
* messages can be grouped by subject and use original order (for Listserv)
* adds option to index emails without running the import
* Disable journaling to improve performance in Docker
* Use the email cooking method
* Store IncomingEmail in order find related posts by Message-ID
* Escape HTML in imported messages
