Rejections

Client v2 sync

Add doc string for __nonzero__ overrides for sync results, raise not implemented if the client attempts to do a gapless sync

Conflicts:
	synapse/storage/schema/im.sql

Replication split

Means that now you can't do exact matches even in override rules,
but I think we can live with that. Advantage is that you'll now
always get back what was put in to the API.

Rejections storage

Conflicts:
	synapse/storage/__init__.py

Client v2 filter

New state resolution

Conflicts:
	synapse/storage/schema/delta/v12.sql

Conflicts:
	synapse/storage/__init__.py
	synapse/storage/schema/delta/v12.sql

Fix bug where we superfluously asked for current state. Change API of /query_auth/ so that we don't duplicate events in the response.