Split the array element selection and the member selection.

* Unit tests for OC_Filechunking to verify the isComplete function
* Intergration tests to show that shuffling chunks is all fine

* Upload file with checksum
* Chunked upload with checksum
* Copy file with checksum should also copy the checksum
* Moving a file with checksum should also move the checksum
* Uploading a file with checksum and overwriting it with a file without cheksum should remove the checksum

Fixes #22675

Since we only get a share id we do not know the path for the sharer.
Now if we edit a share we start searching for shares for that user of
that node. And deduce the permissions that way.

* Intergration test added
* Fix unit tests

Returns -3 for unlimited quota in Webdav response.
Also adjusted personal page to show unlimited quota when set.

* Updated unit tests
* Added intergration test

Sharing of the users root folder should not be allowed as it is very
weird UX. Also many of our clients have no proper way of displaying
this.

Added unit test

Also added intergration tests to make sure we won't allow it in the
future.

This adds the integration tests for the CSRF protection on the DAV backend introduced with 9.0.

Fixes https://github.com/owncloud/core/issues/22598

* user with a quota of 0 gets a file shared and can't update this file
  because the wrong quota is used to verify if the update is allowed

Recent refactorings have resulted in the header being added twice, this makes browsers ignore the header which removes any security gains.

This changeset adds the header only once and adds integration tests ensuring the correct header in future.

https://github.com/owncloud/core/issues/22577

This adds integration tests for the comments. Especially with regard to the permission handling, didn't find any problem in it.

Fixes https://github.com/owncloud/core/issues/22367

Moves the update notification code in a single app. This is required since we want to use SSO for the new updater and for this have some code running in ownCloud as well (and we don't want that in core neccessarily). This app can provide that in the future, right now it's only the update notification itself. Will continue working on the SSO right away but wanted to keep the PR small.

Furthermore also makes some more code unit-testable...

This commit consists of patches automatically generated for this project on https://scrutinizer-ci.com

The new sharing code handles things differently so there is no way for
create shares to handle this all properly.

Else we run into race conditions with the skeleton code