Currently we rely on `current_state_events` to figure out what rooms a
user was in and their last membership event in there. However, if the
server leaves the room then the table may be cleaned up and that
information is lost. So lets add a table that separately holds that
information.
administrators can now:
- Set displayname of users
- Update user avatars
- Search for users by user_id
- Browse all users in a paginated API
- Reset user passwords
- Deactivate users
Helpers for doing paginated queries has also been added to storage
Signed-off-by: Morteza Araby <morteza.araby@ericsson.com>
Removes device_id and ClientInfo
device_id is never actually written, and the matrix.org DB has no
non-null entries for it. Right now, it's just cluttering up code.
This doesn't remove the columns from the database, because that's
fiddly.
