Add more server default rules so we have default rules for whether you get notifs for invites / random member events

Add the highlight tweak where messages should be highlighted a different colour in appropriate clients.

Conflicts:
	synapse/storage/schema/pusher.sql

Schema versioning

Twisted adbapi wrapped connections aren't context managers.

Application services exclusive flag support

Batched get pdu

Add config option to set the soft fd limit on start

Federation rate limit