Signed-off-by: Jeremy Cline <jeremy@jcline.org>

Mention SyTest in the README, after Development

mention federation tester more prominently in the readme

Fix wrong avatars when inviting multiple users when creating room

Add all local users to the user_directory and optionally search them

This was introduced in d7ea8c48 / PR #2728

support custom login types for validating users

Wire the custom login type support from password providers into the UI-auth
user-validation flows.

Factor out a validate_user_via_ui_auth method

Collect together all the places that validate a logged-in user via UI auth.

Refactor UI auth implementation

Instead of returning False when auth is incomplete, throw an exception which
can be caught with a wrapper.

federation_client script: Support for posting content

Improve comments on get_user_by_access_token

Delete devices and pushers on logouts etc

Initial commit; this doesn't work yet - the LIKE filtering seems too aggressive.
It also needs _do_initial_spam to be aware of prepopulating the whole user_directory_search table with all users...
...and it needs a handle_user_signup() or something to be added so that new signups get incrementally added to the table too.

Committing it here as a WIP

Make sure that we delete devices whenever a user is logged out due to any of
the following situations:

 * /logout
 * /logout_all
 * change password
 * deactivate account (by the user or by an admin)
 * invalidate access token from a dynamic module

Fixes #2672.

Non-functional refactoring to move set_password. This means that we'll be able
to properly deactivate devices and access tokens without introducing a
dependency loop.

Non-functional refactoring to move deactivate_account. This means that we'll be
able to properly deactivate devices and access tokens without introducing a
dependency loop.