Changes in synapse v0.25.0-rc1 (2017-11-14)

===========================================

Features:

* Add is_public to groups table to allow for private groups (PR #2582)
* Add a route for determining who you are (PR #2668) Thanks to
  @turt2live!
* Add more features to the password providers (PR #2608, #2610, #2620,
  #2622, #2623, #2624, #2626, #2628, #2629)
* Add a hook for custom rest endpoints (PR #2627)
* Add API to update group room visibility (PR #2651)

Changes:

* Ignore <noscript> tags when generating URL preview descriptions (PR
  #2576) Thanks to @maximevaillancourt!
* Register some /unstable endpoints in /r0 as well (PR #2579) Thanks to
  @krombel!
* Support /keys/upload on /r0 as well as /unstable (PR #2585)
* Front-end proxy: pass through auth header (PR #2586)
* Allow ASes to deactivate their own users (PR #2589)
* Remove refresh tokens (PR #2613)
* Automatically set default displayname on register (PR #2617)
* Log login requests (PR #2618)
* Always return `is_public` in the `/groups/:group_id/rooms` API (PR
  #2630)
* Avoid no-op media deletes (PR #2637) Thanks to @spantaleev!
* Fix various embarrassing typos around user_directory and add some doc.
  (PR #2643)
* Return whether a user is an admin within a group (PR #2647)
* Namespace visibility options for groups (PR #2657)
* Downcase UserIDs on registration (PR #2662)
* Cache failures when fetching URL previews (PR #2669)

Bug fixes:

* Fix port script (PR #2577)
* Fix error when running synapse with no logfile (PR #2581)
* Fix UI auth when deleting devices (PR #2591)
* Fix typo when checking if user is invited to group (PR #2599)
* Fix the port script to drop NUL values in all tables (PR #2611)
* Fix appservices being backlogged and not receiving new events due to a
  bug in notify_interested_services (PR #2631) Thanks to @xyzz!
* Fix updating rooms avatar/display name when modified by admin (PR
  #2636) Thanks to @farialima!
* Fix bug in state group storage (PR #2649)
* Fix 500 on invalid utf-8 in request (PR #2663)
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