changes to user authorized_keys files not immediately incorporated
In the current default configuration, the user-controlled authorized_keys file is appended to the end of the monkeysphere-controlled authorized_keys file. However, this is only done when an administrator run the update-users command. This means that users can add keys to authorized_keys file, but then still not be able to log in with that key until the admin does an update.
We could by default schedule updates, but that still means there would potentially still be an unknown delay for the user.
How do we get around this? "incron":http://inotify.aiken.cz/?section=incron&page=faq&lang=en is a possibility, but it would requires another unusual dependency.
(from redmine: created on 2009-01-30, relates #500)