Add a send-digests subcommand to send list digests right now.
* Add a `mailman send-digests` subcommand which replaces the functionality of
the MM2.1 senddigests.py cronjob.
* Use mlist.data_path where appropriate instead of crafting it from
config.LIST_DATA_DIR. This makes it more consistent to switch to using the
list-id as the data subdirectory.
* Refactor the to_digest handler so that we can implement
maybe_send_digest_now() for the internal API.
* Fix some typos in subcommand --help summaries.
14 files changed: