Merge tag 'v1.38.0rc1' into develop

Synapse 1.38.0rc1 (2021-07-06)
==============================

This release includes a database schema update which could result in elevated disk usage. See the [upgrade notes](https://matrix-org.github.io/synapse/develop/upgrade#upgrading-to-v1380) for more information.

Features
--------

- Implement refresh tokens as specified by [MSC2918](matrix-org/matrix-spec-proposals#2918). ([\#9450](#9450))
- Add support for evicting cache entries based on last access time. ([\#10205](#10205))
- Omit empty fields from the `/sync` response. Contributed by @deepbluev7. ([\#10214](#10214))
- Improve validation on federation `send_{join,leave,knock}` endpoints. ([\#10225](#10225), [\#10243](#10243))
- Add SSO `external_ids` to the Query User Account admin API. ([\#10261](#10261))
- Mark events received over federation which fail a spam check as "soft-failed". ([\#10263](#10263))
- Add metrics for new inbound federation staging area. ([\#10284](#10284))
- Add script to print information about recently registered users. ([\#10290](#10290))

Bugfixes
--------

- Fix a long-standing bug which meant that invite rejections and knocks were not sent out over federation in a timely manner. ([\#10223](#10223))
- Fix a bug introduced in v1.26.0 where only users who have set profile information could be deactivated with erasure enabled. ([\#10252](#10252))
- Fix a long-standing bug where Synapse would return errors after 2<sup>31</sup> events were handled by the server. ([\#10264](#10264), [\#10267](#10267), [\#10282](#10282), [\#10286](#10286), [\#10291](#10291), [\#10314](#10314), [\#10326](#10326))
- Fix the prometheus `synapse_federation_server_pdu_process_time` metric. Broke in v1.37.1. ([\#10279](#10279))
- Ensure that inbound events from federation that were being processed when Synapse was restarted get promptly processed on start up. ([\#10303](#10303))

Improved Documentation
----------------------

- Move the upgrade notes to [docs/upgrade.md](https://github.com/matrix-org/synapse/blob/develop/docs/upgrade.md) and convert them to markdown. ([\#10166](#10166))
- Choose Welcome & Overview as the default page for synapse documentation website. ([\#10242](#10242))
- Adjust the URL in the README.rst file to point to irc.libera.chat. ([\#10258](#10258))
- Fix homeserver config option name in presence router documentation. ([\#10288](#10288))
- Fix link pointing at the wrong section in the modules documentation page. ([\#10302](#10302))

Internal Changes
----------------

- Drop `Origin` and `Accept` from the value of the `Access-Control-Allow-Headers` response header. ([\#10114](#10114))
- Add type hints to the federation servlets. ([\#10213](#10213))
- Improve the reliability of auto-joining remote rooms. ([\#10237](#10237))
- Update the release script to use the semver terminology and determine the release branch based on the next version. ([\#10239](#10239))
- Fix type hints for computing auth events. ([\#10253](#10253))
- Improve the performance of the spaces summary endpoint by only recursing into spaces (and not rooms in general). ([\#10256](#10256))
- Move event authentication methods from `Auth` to `EventAuthHandler`. ([\#10268](#10268))
- Re-enable a SyTest after it has been fixed. ([\#10292](#10292))

Author: babolivier

CHANGES.md

@@ -1,7 +1,7 @@
 Synapse 1.38.0rc1 (2021-07-06)
 ==============================
 
-This release includes a database schema update which could result in elevated disk usage. See the [upgrade notes](https://matrix-org.github.io/synapse/develop/upgrade.md#upgrading-to-v1380) for more information.
+This release includes a database schema update which could result in elevated disk usage. See the [upgrade notes](https://matrix-org.github.io/synapse/develop/upgrade#upgrading-to-v1380) for more information.
 
 Features
 --------
@@ -21,7 +21,7 @@ Bugfixes
 
 - Fix a long-standing bug which meant that invite rejections and knocks were not sent out over federation in a timely manner. ([\#10223](https://github.com/matrix-org/synapse/issues/10223))
 - Fix a bug introduced in v1.26.0 where only users who have set profile information could be deactivated with erasure enabled. ([\#10252](https://github.com/matrix-org/synapse/issues/10252))
-- Fix a long-standing bug where Synapse would return errors after 2<sup>31</sup> events were handled by the server. ([\#10264](https://github.com/matrix-org/synapse/issues/10264), [\#10267](https://github.com/matrix-org/synapse/issues/10267), [\#10282](https://github.com/matrix-org/synapse/issues/10282), [\#10286](https://github.com/matrix-org/synapse/issues/10286), [\#10291](https://github.com/matrix-org/synapse/issues/10291), [\#10314](https://github.com/matrix-org/synapse/issues/10314))
+- Fix a long-standing bug where Synapse would return errors after 2<sup>31</sup> events were handled by the server. ([\#10264](https://github.com/matrix-org/synapse/issues/10264), [\#10267](https://github.com/matrix-org/synapse/issues/10267), [\#10282](https://github.com/matrix-org/synapse/issues/10282), [\#10286](https://github.com/matrix-org/synapse/issues/10286), [\#10291](https://github.com/matrix-org/synapse/issues/10291), [\#10314](https://github.com/matrix-org/synapse/issues/10314), [\#10326](https://github.com/matrix-org/synapse/issues/10326))
 - Fix the prometheus `synapse_federation_server_pdu_process_time` metric. Broke in v1.37.1. ([\#10279](https://github.com/matrix-org/synapse/issues/10279))
 - Ensure that inbound events from federation that were being processed when Synapse was restarted get promptly processed on start up. ([\#10303](https://github.com/matrix-org/synapse/issues/10303))