Merge branch 'develop' of github.com:matrix-org/synapse into anoa/fix_account_data_sync

* 'develop' of github.com:matrix-org/synapse:
  Blacklist PurgeRoomTestCase (#6361)
  Set room version default to 5

changelog.d/6220.feature

@@ -0,0 +1 @@
+Increase default room version from 4 to 5, thereby enforcing server key validity period checks.

changelog.d/6361.misc

@@ -0,0 +1 @@
+Temporarily blacklist the failing unit test PurgeRoomTestCase.test_purge_room.

docs/sample_config.yaml

@@ -72,7 +72,7 @@ pid_file: DATADIR/homeserver.pid
 # For example, for room version 1, default_room_version should be set
 # to "1".
 #
-#default_room_version: "4"
+#default_room_version: "5"
 
 # The GC threshold parameters to pass to `gc.set_threshold`, if defined
 #

synapse/config/server.py

@@ -41,7 +41,7 @@ logger = logging.Logger(__name__)
 # in the list.
 DEFAULT_BIND_ADDRESSES = ["::", "0.0.0.0"]
 
-DEFAULT_ROOM_VERSION = "4"
+DEFAULT_ROOM_VERSION = "5"
 
 ROOM_COMPLEXITY_TOO_GREAT = (
     "Your homeserver is unable to join rooms this large or complex. "

tests/rest/admin/test_admin.py

@@ -641,3 +641,5 @@ class PurgeRoomTestCase(unittest.HomeserverTestCase):
             )
 
             self.assertEqual(count, 0, msg="Rows not purged in {}".format(table))
+
+    test_purge_room.skip = "Disabled because it's currently broken"