The synapse demo was a bit flakey in terms of supporting federation. It turns out that if your computer resolved `localhost` to `::1` instead of `127.0.0.1`, the built-in federation blacklist specified in `start.sh` would still block it, since it contained an entry for `::/127`. Removing this no longer prevents Synapse from contacting `::1`, federation works again on these boxes.

Added database owner authentication with `sudo` when `su` does not work

* Delete format_tap.py

This python implementation of a tap formatting library for buildkite has been
replaced with a perl implementation as part of the matrix-org/sytest repo,
which is specific to sytest's language, not that of any one homeserver's.

This method was somewhat redundant, and confusing.

Remove a bunch of dead event_auth code.

Turns out that loggers that are instantiated before the config is loaded get
turned off.

Also bring the logging config that is generated by --generate-config into line.

Fixes #6194.

Synapse 1.4.1 (2019-10-18)
==========================

No changes since 1.4.1rc1.

Synapse 1.4.1rc1 (2019-10-17)
=============================

Bugfixes
--------

- Fix bug where redacted events were sometimes incorrectly censored in the database, breaking APIs that attempted to fetch such events. ([\#6185](https://github.com/matrix-org/synapse/issues/6185), [5b0e9948](https://github.com/matrix-org/synapse/commit/5b0e9948eaae801643e594b5abc8ee4b10bd194e))

Move rest/admin to use async/await.

Small fix to synapse_port_db to be able to convert from database schema v56.

* Fix presence timeouts when synchrotron restarts.

Handling timeouts would fail if there was an external process that had
timed out, e.g. a synchrotron restarting. This was due to a couple of
variable name typoes.

Fixes #3715.

The only possible rejection reason is AUTH_ERROR, so all of this is unreachable.

This is part of 1.4.1

Synapse 1.4.1rc1 (2019-10-17)
=============================

Bugfixes
--------

- Fix bug where redacted events were sometimes incorrectly censored in the database, breaking APIs that attempted to fetch such events. ([\#6185](https://github.com/matrix-org/synapse/issues/6185), [5b0e9948](https://github.com/matrix-org/synapse/commit/5b0e9948eaae801643e594b5abc8ee4b10bd194e))

Fix inserting bytes as text in `censor_redactions`

make storage layer in charge of interpreting the device key data

make version optional in body of e2e backup version update

Trace non-JSON APIs, /media, /key etc

Now, the CAS server can return an attribute stating what's the desired displayname, instead of using the username directly.