This will allow us to reuse the same structure when we paginate e.g.
relations

Allow client event serialization to be async

Expose DataStore._get_events as get_events_as_list

Use correct config option for ratelimiting in tests

Co-Authored-By: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

Co-Authored-By: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

This is in preparation for reaction work which requires it.

Migrate all tests to use the dict-based config format instead of hanging items off HomeserverConfig (#5171)

Fix CI after new release of isort

Prevents a SynapseError being raised inside of a IResolutionReceiver and instead opts to just return 0 results. This thus means that we have to lump a failed lookup and a blacklisted lookup together with the same error message, but the substitute should be generic enough to cover both cases.

Accidentally went straight to develop

This allows the client to complete the email last which is more
natual for the user. Without this stage, if the client would
complete the recaptcha (and terms, if enabled) stages and then the
registration request would complete because you've now completed a
flow, even if you were intending to complete the flow that's the
same except has email auth at the end.

Adding a dummy auth stage to the recaptcha-only flow means it's
always unambiguous which flow the client was trying to complete.
Longer term we should think about changing the protocol so the
client explicitly says which flow it's trying to complete.

https://github.com/vector-im/riot-web/issues/9586

Signed-off-by: Gergely Polonkai <gergely@polonkai.eu>

* Add AllowEncodedSlashes to apache

Add `AllowEncodedSlashes On` to apache config to support encoding for v3 rooms. "The AllowEncodedSlashes setting is not inherited by virtual hosts, and virtual hosts are used in many default Apache configurations, such as the one in Ubuntu. The workaround is to add the AllowEncodedSlashes setting inside a <VirtualHost> container (/etc/apache2/sites-available/default in Ubuntu)." Source: https://stackoverflow.com/questions/4390436/need-to-allow-encoded-slashes-on-apache

* change allowencodedslashes to nodecode

We don't ship jessie packages, so these were a bit misleading.

... mostly to fix pep8 fails

Fixes #3951.