* Initial federation sender -> federation API refactoring
* Move base into own package, avoids import cycle
* Fix build errors
* Fix tests
* Add signing key server tables
* Try to fold signing key server into federation API
* Fix dendritejs builds
* Update embedded interfaces
* Fix panic, fix lint error
* Update configs, docker
* Rename some things
* Reuse same keyring on the implementing side
* Fix federation tests, `NewBaseDendrite` can accept freeform options
* Fix build
* Update create_db, configs
* Name tables back
* Don't rename federationsender consumer for now
* Deduplicate FS database, add some EDU persistence groundwork
* Extend TransactionWriter to use optional existing transaction, use that for FS SQLite database writes
* Fix build due to bad keyserver import
* Working EDU persistence
* gocyclo, unsurprisingly
* Remove unused
* Update copyright notices
* Initial work on persistent queues
* Update index for event ID and server name
* Put things into database (postgres for now)
* Duplicate postgres code into sqlite for now just to stop build errors, will fix SQLite soon
* Fix table name
* Fix index
* Fix table name
* Use RETURNING because LastInsertID is not supported by postgres
* Use functions
* Marshal headered event
* Don't error on now rows
* Don't block if there are PDUs waiting
* Try to tidy up JSON
* Debug logging
* Fix query, use transactions in postgres
* Clean up
* Rehydrate more opportunistically
* Fix SQLite
* remove unused types
* Review comments
* Shuffle things around a bit
* Clean up transaction properly
* Don't send empty transactions
* Reduce unnecessary retries
* Count PDUs to make more resilient
* Don't stop when there is work to be done
* Try to limit wakeups
* well this is tedious
* Fix race in incomplete transactions
* Thread safety on transaction ID/count
