* Update sync responses
* Fix positions, add ApplyUpdates
* Fix MarshalText as non-pointer, PrevBatch is optional
* Increment by number of read receipts
* Merge branch 'master' into neilalexander/devicelist
* Tweak typing
* Include keyserver position tweak
* Fix typing next position in all cases
* Tweaks
* Fix typo
* Tweaks, restore StreamingToken.MarshalText which somehow went missing?
* Rely on positions from notifier rather than manually advancing them
* Revert "Rely on positions from notifier rather than manually advancing them"
This reverts commit 53112a62cc3bfd9989acab518e69eeb27938117a.
* Give invites their own position, fix other things
* Fix test
* Fix invites maybe
* Un-whitelist tests that look to be genuinely wrong
* Use real receipt positions
* Ensure send-to-device uses real positions too
* Offset updates take place using TransactionWriter
* Refactor TransactionWriter in current state server
* Refactor TransactionWriter in federation sender
* Refactor TransactionWriter in key server
* Refactor TransactionWriter in media API
* Refactor TransactionWriter in server key API
* Refactor TransactionWriter in sync API
* Refactor TransactionWriter in user API
* Fix deadlocking Sync API tests
* Un-deadlock device database
* Fix appservice API
* Rename TransactionWriters to Writers
* Move writers up a layer in sync API
* Document sqlutil.Writer interface
* Add note to Writer documentation
* Updated TransactionWriters, moved locks in roomserver, various other tweaks
* Fix redaction deadlocks
* Fix lint issue
* Rename SQLiteTransactionWriter to ExclusiveTransactionWriter
* Fix us not sending transactions through in latest events updater
* Persist partition|offset|user_id in the keyserver
Required for a query API which will be used by the syncapi which
will be called when a `/sync` request comes in which will return
a list of user IDs of people who have changed their device keys
between two tokens.
* Add tests and fix maxOffset bug
* s/offset/log_offset/g because 'offset' is a reserved word in postgres
