the login password changed at the user back-end (e.g ldap). Such failures will
be handled after login correctly by allowing the user to adjust the passwords

* Move Encryption to PSR-4

* Move encryption tests to PSR-4

* Fix the tests

Probably nice for the people that contributed to 9.0 to see themselves in the AUTHORS file :)

Saves a call to fetch the file id which didn't even work for a reason.

This fix properly sets the version in the database.

This way it is not possible anymore for an external storage admin to put up old versions of the file.

Makes static code analyzers happier.

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

delete all file keys doesn't need the encryption module as parameter; implement rmdir; getFileKeyDir should also work for part files and complete directories