+Database changes
+----------------
+Store a reference term for every message-id that appears in
+References. We just started doing this for newly-added documents, but
+at the next convenient database-schema upgrade, we should go back and
+fix old messages to be consistent.
+
+Start indexing the List-Id header, (and re-index this header for
+existing messages at the next database upgrade).
+
+Start indexing the message file's directory ana make it available for
+search as "folder:" (and re-index this value for existing messages at
+the next database upgrade).
+
+Add support for the user to specify custom headers to be indexed (and
+re-index these for existing messages at the next database upgrade).
+
+Test suite
+----------
+Start testing --format=json.
+
+Achieve 100% test coverage with the test suite.
+
+Modularize test suite (to be able to run individual tests).
+
+Summarize test results at the end.
+
+Fix the insane quoting nightmare of the test suite, (and once we do
+that we can actually test the implicit-phrase search feature such as
+"notmuch search 'body search (phrase)'"
+
+Test "notmuch reply" choosing the correct email address from the
+Received header when no configured email address appears in To or Cc.
+