fix for autoloader while user logged in and system is in maintenance
use legacyDecrypt to decrypt key file like the previous files_encryption
fix re-encrypt legacy files
fix legacy key in until test
normalize path to prevent following split to fail
Merge branch 'master' into files_encryption_upgrade_fix

Conflicts:
	apps/files_encryption/lib/util.php
Merge branch 'master' into files_encryption_upgrade_fix

Conflicts:
	apps/files_encryption/appinfo/app.php
cleanup unused method legacyKeyRecryptKeyfile
Merge branch 'master' into files_encryption_upgrade_fix

Conflicts:
	apps/files_encryption/tests/crypt.php
update submodule
LegacyKeyRecryptKeyfileEncrypt() no longer exists, so test can be removed
Merge branch 'files_encryption_upgrade_fix' of github.com:owncloud/core into files_encryption_upgrade_fix
Merge branch 'master' into files_encryption_upgrade_fix
Merge pull request #3552 from owncloud/files_encryption_upgrade_fix

Fix files_encryption app upgrade from 4.5 to 5.0