* Change Caddy links

Current links points to Caddy v1 which is deprecated.

Signed-off-by: Nicolai Søborg <git@xn--sb-lka.org>

This table is no longer used, so we may as well stop populating it. Removing it
would prevent people rolling back to older releases of Synapse, so that can
happen in a future release.

* Add libwebp dependency to Dockerfile

Signed-off-by: Juho Vanhanen <juho@vanhanen.io>

* Fix spec compliance; tweaks without values are valid

(default to True, which is only concretely specified for
`highlight`, but it seems only reasonable to generalise)

* Changelog for 7766.

* Add documentation to `tweaks_for_actions`

May as well tidy up when I'm here.

* Add a test for `tweaks_for_actions`

Fixes https://github.com/matrix-org/synapse/issues/7641

The package was pinned to <0.8.0 without an obvious reasoning with
7ad1d763
in https://github.com/matrix-org/synapse/pull/5636


while the version selection looks to just try to exclude an arbitrary
next minor version number that might introduce API breaking changes.
Selecting the next minor number might be a good conservative selection.

Downstream distributions already reported success patching out the version
requirements.

This also fixes the integration of upgraded packages into openSUSE packages,
e.g. for openSUSE Tumbleweed which already ships prometheus_client >= 0.8 .

Signed-off-by: Oliver Kurz <okurz@suse.de>

Co-authored-by: Richard van der Hoff <1389908+richvdh@users.noreply.github.com>

The CI appears to use the latest version of isort, which is a problem when isort gets a major version bump. Rather than try to pin the version, I've done the necessary to make isort5 happy with synapse.

fixes #7016

Useful when config file is fully commented

Signed-off-by: Alex Kotov <kotovalexarian@gmail.com>

Synapse 1.16.0rc2 (2020-07-02)
==============================

Synapse 1.16.0rc2 includes the security fixes released with Synapse 1.15.2.
Please see [below](https://github.com/matrix-org/synapse/blob/master/CHANGES.md#synapse-1152-2020-07-02) for more details.

Improved Documentation
----------------------

- Update postgres image in example `docker-compose.yaml` to tag `12-alpine`. ([\#7696](https://github.com/matrix-org/synapse/issues/7696))

Internal Changes
----------------

- Add some metrics for inbound and outbound federation latencies: `synapse_federation_server_pdu_process_time` and `synapse_event_processing_lag_by_event`. ([\#7771](https://github.com/matrix-org/synapse/issues/7771))

Synapse 1.15.2 (2020-07-02)
===========================

Due to the two security issues highlighted below, server administrators are
encouraged to update Synapse. We are not aware of these vulnerabilities being
exploited in the wild.

Security advisory
-----------------

* A malicious homeserver could force Synapse to reset the state in a room to a
  small subset of the correct state. This affects all Synapse deployments which
  federate with untrusted servers. ([96e9afe6](https://github.com/matrix-org/synapse/commit/96e9afe62500310977dc3cbc99a8d16d3d2fa15c))
* HTML pages served via Synapse were vulnerable to clickjacking attacks. This
  predominantly affects homeservers with single-sign-on enabled, but all server
  administrators are encouraged to upgrade. ([ea26e9a9](https://github.com/matrix-org/synapse/commit/ea26e9a98b0541fc886a1cb826a38352b7599dbe))

  This was reported by [Quentin Gliech](https://sandhose.fr/).

* Remove obsolete comment about ancient temporary code

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

* Implement hack to set push priority

based on whether the tweaks indicate the event might cause
effects.

* Changelog for 7765

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

* Antilint

* Add tests for push priority

Signed-off-by: Olivier Wilkinson (reivilibre) <olivier@librepush.net>

* Update synapse/push/httppusher.py

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>

* Antilint

* Remove needless invites from tests.

Co-authored-by: Brendan Abolivier <babolivier@matrix.org>

my editor was complaining about unset variables, so let's add some early
returns to fix that and reduce indentation/cognitive load.

This makes it much easier to find where streams are referenced.

fix a few things to make this pass mypy.

Introduced in #7755, not yet released.