Changes in synapse v0.29.0-rc1 (2018-05-14)
===========================================

Notable changes, a docker file for running Synapse (Thanks to @kaiyou!) and a
closed spec bug in the Client Server API. Additionally further prep for Python 3
migration.

Potentially breaking change:

* Make Client-Server API return 401 for invalid token (PR #3161).

  This changes the Client-server spec to return a 401 error code instead of 403
  when the access token is unrecognised. This is the behaviour required by the
  specification, but some clients may be relying on the old, incorrect
  behaviour.

  Thanks to @NotAFile for fixing this.

Features:

* Add a Dockerfile for synapse (PR #2846) Thanks to @kaiyou!

Changes:

* nuke-room-from-db.sh: added postgresql option and help (PR #2337) Thanks to @rubo77!
* Make 'unexpected logging context' into warnings (PR #3007)
* Open certificate files as bytes (PR #3084) Thanks to @NotAFile!
* Open config file in non-bytes mode (PR #3085) Thanks to @NotAFile!
* Make event properties raise AttributeError instead (PR #3102) Thanks to @NotAFile!
* Use six.moves.urlparse (PR #3108) Thanks to @NotAFile!
* Use deferred.addTimeout instead of time_bound_deferred (PR #3127)
* remove duplicates from groups tables (PR #3129)
* Miscellaneous fixes to python_dependencies (PR #3136)
* Improve exception handling for background processes (PR #3138)
* Add missing consumeErrors to improve exception handling (PR #3139)
* Use run_in_background in preference to preserve_fn (PR #3140)
* Refactor event storage to prepare for changes in state calculations (PR #3141)
* reraise exceptions more carefully (PR #3142)
* Remove redundant call to preserve_fn (PR #3143)
* Trap exceptions thrown within run_in_background (PR #3144)
* Add py3 tests to tox with folders that work (PR #3145) Thanks to @NotAFile!
* Don't yield in list comprehensions (PR #3150) Thanks to @NotAFile!
* Move more xrange to six (PR #3151) Thanks to @NotAFile!
* make imports local (PR #3152) Thanks to @NotAFile!
* move httplib import to six (PR #3153) Thanks to @NotAFile!
* Replace stringIO imports with six (PR #3154) Thanks to @NotAFile!
* more bytes strings (PR #3155) Thanks to @NotAFile!
* Construct HMAC as bytes on py3 (PR #3156) Thanks to @NotAFile!
* run config tests on py3 (PR #3159) Thanks to @NotAFile!
* add guard for None on purge_history api (PR #3160) Thanks to @krombel!
* Refactor /context to reuse pagination storage functions (PR #3193)
* Refactor recent events func to use pagination func (PR #3195)
* Refactor pagination DB API to return concrete type (PR #3196)
* Refactor get_recent_events_for_room return type (PR #3198)
* Refactor sync APIs to reuse pagination API (PR #3199)
* Remove unused code path from member change DB func (PR #3200)
* Part user from rooms on account deactivate (PR #3201)
* Refactor request handling wrappers (PR #3203)
* transaction_id, destination defined twice (PR #3209) Thanks to @damir-manapov!

Bug Fixes:

* synapse fails to start under Twisted >= 18.4 (PR #3135)
* Fix incorrect reference to StringIO (PR #3168)
* Fix a class of logcontext leaks (PR #3170)
* Fix a couple of logcontext leaks in unit tests (PR #3172)
* Fix logcontext leak in media repo (PR #3174)
* Escape label values in prometheus metrics (PR #3175)
* fix http request timeout code (PR #3178)
* Fix 'Unhandled Error' logs with Twisted 18.4 (PR #3182) Thanks to @Half-Shot!
* Fix logcontext leaks in rate limiter (PR #3183)
* Fix metrics that have integer value labels (PR #3186)
* notifications: Convert next_token to string according to the spec (PR #3190) Thanks to @mujx!
* nuke-room-from-db.sh: fix deletion from search table (PR #3194) Thanks to @rubo77!
* Set Server header in SynapseRequest (PR #3208)

Changes in synapse v0.28.1 (2018-05-01)
=======================================

SECURITY UPDATE

* Clamp the allowed values of event depth received over federation to be
  [0, 2**63 - 1].  This mitigates an attack where malicious events
  injected with depth = 2**63 - 1 render rooms unusable.  Depth is used to
  determine the cosmetic ordering of events within a room, and so the ordering
  of events in such a room will default to using stream_ordering rather than depth
  (topological_ordering).

  This is a temporary solution to mitigate abuse in the wild, whilst a long solution
  is being implemented to improve how the depth parameter is used.

  Full details at
  https://docs.google.com/document/d/1I3fi2S-XnpO45qrpCsowZv8P8dHcNZ4fsBsbOW7KABI/edit#

* Pin Twisted to <18.4 until we stop using the private _OpenSSLECCurve API.

Changes in synapse v0.28.0-rc1 (2018-04-26)
===========================================

Bug Fixes:

* Fix quarantine media admin API and search reindex (PR #3130)
* Fix media admin APIs (PR #3134)

Changes in synapse v0.28.0-rc1 (2018-04-24)
===========================================

Minor performance improvement to federation sending and bug fixes.

(Note: This release does not include state resolutions discussed in matrix live)

Features:

* Add metrics for event processing lag (PR #3090)
* Add metrics for ResponseCache (PR #3092)

Changes:

* Synapse on PyPy (PR #2760) Thanks to @Valodim!
* move handling of auto_join_rooms to RegisterHandler (PR #2996) Thanks to @krombel!
* Improve handling of SRV records for federation connections (PR #3016) Thanks to @silkeh!
* Document the behaviour of ResponseCache (PR #3059)
* Preparation for py3 (PR #3061, #3073, #3074, #3075, #3103, #3104, #3106, #3107, #3109, #3110) Thanks to @NotAFile!
* update prometheus dashboard to use new metric names (PR #3069) Thanks to @krombel!
* use python3-compatible prints (PR #3074) Thanks to @NotAFile!
* Send federation events concurrently (PR #3078)
* Limit concurrent event sends for a room (PR #3079)
* Improve R30 stat definition (PR #3086)
* Send events to ASes concurrently (PR #3088)
* Refactor ResponseCache usage (PR #3093)
* Clarify that SRV may not point to a CNAME (PR #3100) Thanks to @silkeh!
* Use str(e) instead of e.message (PR #3103) Thanks to @NotAFile!
* Use six.itervalues in some places (PR #3106) Thanks to @NotAFile!
* Refactor store.have_events (PR #3117)

Bug Fixes:

* Return 401 for invalid access_token on logout (PR #2938) Thanks to @dklug!
* Return a 404 rather than a 500 on rejoining empty rooms (PR #3080)
* fix federation_domain_whitelist (PR #3099)
* Avoid creating events with huge numbers of prev_events (PR #3113)
* Reject events which have lots of prev_events (PR #3118)

Changes in synapse v0.28.0-rc1 (2018-04-24)
===========================================

Minor performance improvement to federation sending and bug fixes.

(Note: This release does not include state resolutions discussed in matrix live)

Features:

* Add metrics for event processing lag (PR #3090)
* Add metrics for ResponseCache (PR #3092)

Changes:

* Synapse on PyPy (PR #2760) Thanks to @Valodim!
* move handling of auto_join_rooms to RegisterHandler (PR #2996) Thanks to @krombel!
* Improve handling of SRV records for federation connections (PR #3016) Thanks to @silkeh!
* Document the behaviour of ResponseCache (PR #3059)
* Preparation for py3 (PR #3061, #3073, #3074, #3075, #3103, #3104, #3106, #3107, #3109, #3110) Thanks to @NotAFile!
* update prometheus dashboard to use new metric names (PR #3069) Thanks to @krombel!
* use python3-compatible prints (PR #3074) Thanks to @NotAFile!
* Send federation events concurrently (PR #3078)
* Limit concurrent event sends for a room (PR #3079)
* Improve R30 stat definition (PR #3086)
* Send events to ASes concurrently (PR #3088)
* Refactor ResponseCache usage (PR #3093)
* Clarify that SRV may not point to a CNAME (PR #3100) Thanks to @silkeh!
* Use str(e) instead of e.message (PR #3103) Thanks to @NotAFile!
* Use six.itervalues in some places (PR #3106) Thanks to @NotAFile!
* Refactor store.have_events (PR #3117)

Bug Fixes:

* Return 401 for invalid access_token on logout (PR #2938) Thanks to @dklug!
* Return a 404 rather than a 500 on rejoining empty rooms (PR #3080)
* fix federation_domain_whitelist (PR #3099)
* Avoid creating events with huge numbers of prev_events (PR #3113)
* Reject events which have lots of prev_events (PR #3118)

Changes in synapse v0.27.4 (2018-04-13)

Update canonicaljson dependency (#3095)

Changes in synapse v0.27.3 (2018-04-11)
=======================================

Bug fixes:

* URL quote path segments over federation (#3082)

Changes in synapse v0.27.3-rc2 (2018-04-09)
==========================================

v0.27.3-rc1 used a stale version of the develop branch so the changelog overstates
the functionality. v0.27.3-rc2 is up to date, rc1 should be ignored.

Changes in synapse v0.27.3-rc1 (2018-04-09)
=======================================

Notable changes include API support for joinability of groups. Also new metrics
and phone home stats. Phone home stats include better visibility of system usage
so we can tweak synpase to work better for all users rather than our own experience
with matrix.org. Also, recording 'r30' stat which is the measure we use to track
overal growth of the Matrix ecosystem. It is defined as:-

Counts the number of native 30 day retained users, defined as:-
         * Users who have created their accounts more than 30 days
         * Where last seen at most 30 days ago
         * Where account creation and last_seen are > 30 days"

Features:

* Add joinability for groups (PR #3045)
* Implement group join API (PR #3046)
* Add counter metrics for calculating state delta (PR #3033)
* R30 stats (PR #3041)
* Measure time it takes to calculate state group ID (PR #3043)
* Add basic performance statistics to phone home (PR #3044)
* Add response size metrics (PR #3071)
* phone home cache size configurations (PR #3063)

Changes:

* Add a blurb explaining the main synapse worker (PR #2886) Thanks to @turt2live!
* Replace old style error catching with 'as' keyword (PR #3000) Thanks to @NotAFile!
* Use .iter* to avoid copies in StateHandler (PR #3006)
* Linearize calls to _generate_user_id (PR #3029)
* Remove last usage of ujson (PR #3030)
* Use simplejson throughout (PR #3048)
* Use static JSONEncoders (PR #3049)
* Remove uses of events.content (PR #3060)
* Improve database cache performance (PR #3068)

Bug fixes:

* Add room_id to the response of `rooms/{roomId}/join` (PR #2986) Thanks to @jplatte!
* Fix replication after switch to simplejson (PR #3015)
* Fix replication after switch to simplejson (PR #3015)
* 404 correctly on missing paths via NoResource (PR #3022)
* Fix error when claiming e2e keys from offline servers (PR #3034)
* fix tests/storage/test_user_directory.py (PR #3042)
* use PUT instead of POST for federating groups/m.join_policy (PR #3070) Thanks to @krombel!
* postgres port script: fix state_groups_pkey error (PR #3072)

Changes in synapse v0.27.2 (2018-03-26)
=======================================

Bug fixes:

* Fix bug which broke TCP replication between workers (PR #3015)

Changes in synapse v0.27.1 (2018-03-26)
=======================================

Meta release as v0.27.0 temporarily pointed to the wrong commit

Changes in synapse v0.27.0 (2018-03-26)
=======================================

No changes since v0.27.0-rc2

Changes in synapse v0.27.0-rc2 (2018-03-19)
===========================================

Pulls in v0.26.1

Bug fixes:

* Fix bug introduced in v0.27.0-rc1 that causes much increased memory usage in state cache (PR #3005)

Changes in synapse v0.27.0-rc1 (2018-03-14)
===========================================

The common case for running Synapse is not to run separate workers, but for those that do, be aware that synctl no longer starts the main synapse when using ``-a`` option with workers. A new worker file should be added with ``worker_app: synapse.app.homeserver``.

This release also begins the process of renaming a number of the metrics
reported to prometheus. See `docs/metrics-howto.rst <docs/metrics-howto.rst#block-and-response-metrics-renamed-for-0-27-0>`_.
Note that the v0.28.0 release will remove the deprecated metric names.

Features:

* Add ability for ASes to override message send time (PR #2754)
* Add support for custom storage providers for media repository (PR #2867, #2777, #2783, #2789, #2791, #2804, #2812, #2814, #2857, #2868, #2767)
* Add purge API features, see `docs/admin_api/purge_history_api.rst <docs/admin_api/purge_history_api.rst>`_ for full details (PR #2858, #2867, #2882, #2946, #2962, #2943)
* Add support for whitelisting 3PIDs that users can register. (PR #2813)
* Add ``/room/{id}/event/{id}`` API (PR #2766)
* Add an admin API to get all the media in a room (PR #2818) Thanks to @turt2live!
* Add ``federation_domain_whitelist`` option (PR #2820, #2821)

Changes:

* Continue to factor out processing from main process and into worker processes. See updated `docs/workers.rst <docs/metrics-howto.rst>`_ (PR #2892 - #2904, #2913, #2920 - #2926, #2947, #2847, #2854, #2872, #2873, #2874, #2928, #2929, #2934, #2856, #2976 - #2984, #2987 - #2989, #2991 - #2993, #2995, #2784)
* Ensure state cache is used when persisting events (PR #2864, #2871, #2802, #2835, #2836, #2841, #2842, #2849)
* Change the default config to bind on both IPv4 and IPv6 on all platforms (PR #2435) Thanks to @silkeh!
* No longer require a specific version of saml2 (PR #2695) Thanks to @okurz!
* Remove ``verbosity``/``log_file`` from generated config (PR #2755)
* Add and improve metrics and logging (PR #2770, #2778, #2785, #2786, #2787, #2793, #2794, #2795, #2809, #2810, #2833, #2834, #2844, #2965, #2927, #2975, #2790, #2796, #2838)
* When using synctl with workers, don't start the main synapse automatically (PR #2774)
* Minor performance improvements (PR #2773, #2792)
* Use a connection pool for non-federation outbound connections (PR #2817)
* Make it possible to run unit tests against postgres (PR #2829)
* Update pynacl dependency to 1.2.1 or higher (PR #2888) Thanks to @bachp!
* Remove ability for AS users to call /events and /sync (PR #2948)
* Use bcrypt.checkpw (PR #2949) Thanks to @krombel!

Bug fixes:

* Fix broken ``ldap_config`` config option (PR #2683) Thanks to @seckrv!
* Fix error message when user is not allowed to unban (PR #2761) Thanks to @turt2live!
* Fix publicised groups GET API (singular) over federation (PR #2772)
* Fix user directory when using ``user_directory_search_all_users`` config option (PR #2803, #2831)
* Fix error on ``/publicRooms`` when no rooms exist (PR #2827)
* Fix bug in quarantine_media (PR #2837)
* Fix url_previews when no Content-Type is returned from URL (PR #2845)
* Fix rare race in sync API when joining room (PR #2944)
* Fix slow event search, switch back from GIST to GIN indexes (PR #2769, #2848)

Changes in synapse v0.27.0-rc2 (2018-03-19)
===========================================

Pulls in v0.26.1

Bug fixes:

* Fix bug introduced in v0.27.0-rc1 that causes much increased memory
  usage in state cache (PR #3005)

Changes in synapse v0.26.1 (2018-03-15)
=======================================

Bug fixes:

* Fix bug where an invalid event caused server to stop functioning
  correctly, due to parsing and serializing bugs in ujson library
  (PR #3008)

Changes in synapse v0.26.1 (2018-03-15)
=======================================

Bug fixes:

* Fix bug where an invalid event caused server to stop functioning
  correctly, due to parsing and serializing bugs in ujson library.

Changes in synapse v0.27.0-rc1 (2018-03-14)
===========================================

The common case for running Synapse is not to run separate workers, but for those that do, be aware that synctl no longer starts the main synapse when using ``-a`` option with workers. A new worker file should be added with ``worker_app: synapse.app.homeserver``.

This release also begins the process of renaming a number of the metrics
reported to prometheus. See `docs/metrics-howto.rst <docs/metrics-howto.rst#block-and-response-metrics-renamed-for-0-27-0>`_.
Note that the v0.28.0 release will remove the deprecated metric names.

Features:

* Add ability for ASes to override message send time (PR #2754)
* Add support for custom storage providers for media repository (PR #2867, #2777, #2783, #2789, #2791, #2804, #2812, #2814, #2857, #2868, #2767)
* Add purge API features, see `docs/admin_api/purge_history_api.rst <docs/admin_api/purge_history_api.rst>`_ for full details (PR #2858, #2867, #2882, #2946, #2962, #2943)
* Add support for whitelisting 3PIDs that users can register. (PR #2813)
* Add ``/room/{id}/event/{id}`` API (PR #2766)
* Add an admin API to get all the media in a room (PR #2818) Thanks to @turt2live!
* Add ``federation_domain_whitelist`` option (PR #2820, #2821)

Changes:

* Continue to factor out processing from main process and into worker processes. See updated `docs/workers.rst <docs/metrics-howto.rst>`_ (PR #2892 - #2904, #2913, #2920 - #2926, #2947, #2847, #2854, #2872, #2873, #2874, #2928, #2929, #2934, #2856, #2976 - #2984, #2987 - #2989, #2991 - #2993, #2995, #2784)
* Ensure state cache is used when persisting events (PR #2864, #2871, #2802, #2835, #2836, #2841, #2842, #2849)
* Change the default config to bind on both IPv4 and IPv6 on all platforms (PR #2435) Thanks to @silkeh!
* No longer require a specific version of saml2 (PR #2695) Thanks to @okurz!
* Remove ``verbosity``/``log_file`` from generated config (PR #2755)
* Add and improve metrics and logging (PR #2770, #2778, #2785, #2786, #2787, #2793, #2794, #2795, #2809, #2810, #2833, #2834, #2844, #2965, #2927, #2975, #2790, #2796, #2838)
* When using synctl with workers, don't start the main synapse automatically (PR #2774)
* Minor performance improvements (PR #2773, #2792)
* Use a connection pool for non-federation outbound connections (PR #2817)
* Make it possible to run unit tests against postgres (PR #2829)
* Update pynacl dependency to 1.2.1 or higher (PR #2888) Thanks to @bachp!
* Remove ability for AS users to call /events and /sync (PR #2948)
* Use bcrypt.checkpw (PR #2949) Thanks to @krombel!

Bug fixes:

* Fix broken ``ldap_config`` config option (PR #2683) Thanks to @seckrv!
* Fix error message when user is not allowed to unban (PR #2761) Thanks to @turt2live!
* Fix publicised groups GET API (singular) over federation (PR #2772)
* Fix user directory when using ``user_directory_search_all_users`` config option (PR #2803, #2831)
* Fix error on ``/publicRooms`` when no rooms exist (PR #2827)
* Fix bug in quarantine_media (PR #2837)
* Fix url_previews when no Content-Type is returned from URL (PR #2845)
* Fix rare race in sync API when joining room (PR #2944)
* Fix slow event search, switch back from GIST to GIN indexes (PR #2769, #2848)

Changes in synapse v0.26.0 (2018-01-05)
=======================================

No changes since v0.26.0-rc1

Changes in synapse v0.26.0-rc1 (2017-12-13)
===========================================

Features:

* Add ability for ASes to publicise groups for their users (PR #2686)
* Add all local users to the user_directory and optionally search them (PR
  #2723)
* Add support for custom login types for validating users (PR #2729)

Changes:

* Update example Prometheus config to new format (PR #2648) Thanks to
  @krombel!
* Rename redact_content option to include_content in Push API (PR #2650)
* Declare support for r0.3.0 (PR #2677)
* Improve upserts (PR #2684, #2688, #2689, #2713)
* Improve documentation of workers (PR #2700)
* Improve tracebacks on exceptions (PR #2705)
* Allow guest access to group APIs for reading (PR #2715)
* Support for posting content in federation_client script (PR #2716)
* Delete devices and pushers on logouts etc (PR #2722)

Bug fixes:

* Fix database port script (PR #2673)
* Fix internal server error on login with ldap_auth_provider (PR #2678) Thanks
  to @jkolo!
* Fix error on sqlite 3.7 (PR #2697)
* Fix OPTIONS on preview_url (PR #2707)
* Fix error handling on dns lookup (PR #2711)
* Fix wrong avatars when inviting multiple users when creating room (PR #2717)
* Fix 500 when joining matrix-dev (PR #2719)

Changes in synapse v0.26.0-rc1 (2017-12-13)
===========================================

Features:

* Add ability for ASes to publicise groups for their users (PR #2686)
* Add all local users to the user_directory and optionally search them (PR
  #2723)
* Add support for custom login types for validating users (PR #2729)

Changes:

* Update example Prometheus config to new format (PR #2648) Thanks to
  @krombel!
* Rename redact_content option to include_content in Push API (PR #2650)
* Declare support for r0.3.0 (PR #2677)
* Improve upserts (PR #2684, #2688, #2689, #2713)
* Improve documentation of workers (PR #2700)
* Improve tracebacks on exceptions (PR #2705)
* Allow guest access to group APIs for reading (PR #2715)
* Support for posting content in federation_client script (PR #2716)
* Delete devices and pushers on logouts etc (PR #2722)

Bug fixes:

* Fix database port script (PR #2673)
* Fix internal server error on login with ldap_auth_provider (PR #2678) Thanks
  to @jkolo!
* Fix error on sqlite 3.7 (PR #2697)
* Fix OPTIONS on preview_url (PR #2707)
* Fix error handling on dns lookup (PR #2711)
* Fix wrong avatars when inviting multiple users when creating room (PR #2717)
* Fix 500 when joining matrix-dev (PR #2719)

Changes in synapse v0.25.1 (2017-11-17)
=======================================

Bug fixes:

* Fix login with LDAP and other password provider modules (PR #2678). Thanks to
  @jkolo!

Changes in synapse v0.25.0 (2017-11-15)
=======================================

Bug fixes:

* Fix port script (PR #2673)

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)

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)

Changes in synapse v0.24.1 (2017-10-24)
=======================================

Bug fixes:

* Fix updating group profiles over federation (PR #2567)