It looks like CAPTCHA_SETUP.rst contains information relevant to an old version of Synapse, but Synapse now has a different approach to configuring use of the X-Forwarded-For header.

Ignore new rejected events when working out forward extremities.

Remove a few aspirational but unused constants

from the Kegan era

Administration functionalities

Bump cache sizes for common membership queries

Measure new device list stuff

Make /keys/changes a bit more performant

Make presence.get_new_events a bit faster

We do this by caching the set of users a user shares rooms with.

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>

Fix email push in pusher worker

This was broken when device list updates were implemented, as Mailer
could no longer instantiate an AuthHandler due to a dependency on
federation sending.

Include newly joined users in /keys/changes API