Merge branch 'develop' into rei/complement_workers_in_ci

Author: reivilibre

.git-blame-ignore-revs

@@ -6,3 +6,6 @@ aff1eb7c671b0a3813407321d2702ec46c71fa56
 
 # Update black to 20.8b1 (#9381).
 0a00b7ff14890987f09112a2ae696c61001e6cf1
+
+# Convert tests/rest/admin/test_room.py to unix file endings (#7953).
+c4268e3da64f1abb5b31deaeb5769adb6510c0a7

CHANGES.md

@@ -0,0 +1 @@
+Remove support for the non-standard groups/communities feature from Synapse.

changelog.d/10533.misc

@@ -0,0 +1 @@
+Remove support for the non-standard groups/communities feature from Synapse.

changelog.d/12477.misc

@@ -0,0 +1 @@
+Experimental support for [MSC3772](https://github.com/matrix-org/matrix-spec-proposals/pull/3772): Push rule for mutually related events.

changelog.d/12498.misc

@@ -0,0 +1 @@
+Always send an `access_token` in `/thirdparty/` requests to appservices, as required by the [Matrix specification](https://spec.matrix.org/v1.1/application-service-api/#third-party-networks).