Closes #1703

* Add support for Redis-Sentinel.

* Add tests for redis sentinel store.

* Documentation about Redis-Sentinel and password protection.

* Fix markdown syntax brought up by github actions.

* Add missing config parameter to unit tests.

* Add missing return-type

* Fix indentation

* Fix incorrect configuration-methods

Co-authored-by: Tim van Dijen <tvdijen@gmail.com>

* Add support for Redis-Sentinel.

* Add tests for redis sentinel store.

* Documentation about Redis-Sentinel and password protection.

* Fix markdown syntax brought up by github actions.

* Add missing config parameter to unit tests.

* Add missing return-type

* Fix indentation

* Fix incorrect configuration-methods

Co-authored-by: Tim van Dijen <tvdijen@gmail.com>

The protectindexpage test was broken and never changed the
protectindexpage setting, but the logic was also broken so
it always passed and never got past the protected index
page guard in the controller so not a lot of code in the
controller was run.

Also add more tests for the metadata controllers.

The protectindexpage test was broken and never changed the
protectindexpage setting, but the logic was also broken so
it always passed and never got past the protected index
page guard in the controller so not a lot of code in the
controller was run.

Also add more tests for the metadata controllers.

* Translated base attributes and messages to slovak

* Translated module admin to slovak

* Translated modules core and saml to slovak

* Replace tabs with spaces

Co-authored-by: Christian Danizek <christian@danizek.com>

* Translated base attributes and messages to slovak

* Translated module admin to slovak

* Translated modules core and saml to slovak

* Replace tabs with spaces

Co-authored-by: Christian Danizek <christian@danizek.com>

(cherry picked from commit f85e6bf2)

* Allow symfony/translation-contracts ^3

Co-authored-by: Tim van Dijen <tvdijen@gmail.com>

Add Symfony 6 support

Bypass Symfony check for writable log-dir for the case where we configured syslog/errlog/stderr

Bypass Symfony check for writable log-dir for the case where we configured syslog/errlog/stderr

Output encoding happens in the view. This prevents the encoded stuff
from ending up in other places, including log files. Also fixes
tests that were broken because of this.

Date needs to be removed since this is implicit in syslog. For safety,
remove it only when at the start of the string (default format).
If someone creates a custom string they can leave out date entirely
if it's not at the start of the string.

Being more specific fixes that before elements of the actual log
message were eaten by this regexp if they contained a '%'.

Closes: #1549

Partially reverts b7c2caad
and fc1ffee7

Closes: #1660

This reverts commit cd4cb9d4.