this obsoletes id:20170507124012.30188-1-david@tethera.net As with the previous versions: ,---- | WARNING: reindexing is an intrusive operation. I don't think this will | corrupt your database, but previous versions thrashed threading pretty | well. notmuch-dump is your friend. `---- Compared to the last version this rebases against master (and updates a couple of tests merged in the last month to handle the summary format changes) and documents the summary format.