[PATCH 0/4] Synchronize maildir flags in new/

[Austin Clements]

This problem came up again on IRC a few days ago, so I'm finally
posting this series (which I've been running locally for months).

The idea---which is explained in detail in the first patch---is that
messages in new/ are maildir messages with an empty set of maildir
flags.  Currently we treat such messages as non-maildir messages,
which, in particular, means we don't automatically give them the
unread tag.