* files_encryption
* files_versions
* files_trashbin
* tests
* status.php
* core
* server container

* introduce SystemConfig to avoid DI circle (used by database connection which is itself needed by AllConfig that itself contains the methods to access the config.php which then would need the database connection - did you get it? ;))
* use DI container and use that method in legacy code paths (for easier refactoring later)
* create and use getSystemConfig instead of query() in DI container

Fixes https://github.com/owncloud/core/issues/10624

Fix copy paste fail

Add unittest for comma separated headers

Revert 3rdparty

refs #4883

 * http/response.php
 * config.php
 * response.php
 * files.php
 * idbconnection.php
 * app.php
 * user.php
 * template.php
 * share.php
 * db.php
 * icache.php & il10n.php

And greeting from the Atlanta airport. ;-)