LDAP: set filter mode to raw, so filters will not be changed and broken after upgrade from oc5, when visiting the LDAP settings and opening filter tabs
get the correct version number for compare -.-
bump version and don't overwrite values on next update if not necessary
set result entry identifier earlier, i.e. before a continue for the same level can happen. otherwise  will always get the same value and we end up in an infinite loop
add unit test to make sure the infinite loop never comes back
only start migration if the encryption was initialized; allow to overwrite keys if no files exists
Added password obfuscation for external storage config

Added obfuscation for all "password" options from external storages.
Added more ext storage unit tests config.
Added unit tests for reading/writing the configuration.
Added IV for ext storage password encryption
Moved the mounting code for external storage from
OC\Filesystem::initMountPoint to files_external using the post_initMountPoints hook
Fixed ext storage unit test for groups

Squashed backport of 2c561c9c5072ce82e06bd5ab2c4ee81bc5d09d59 from
master.
php upload errors are written to log
don't expect depreciated OC_FilesystemView
reduce multiselect max-width from 400 to 200px to not take too much space
fix expectation - same as in master
Merge pull request #8683 from owncloud/log-upload-error-stable6

Log upload error stable6
simpler and better readable assignment
Merge pull request #8692 from owncloud/fix_unit_tests_oc6

fix failing unit tests on OC6
Merge pull request #8672 from owncloud/stable6-obfuscatepasswords

[backport] [stable6] Added password obfuscation for external storage config
Merge pull request #8579 from owncloud/ldap_nail_filter_on_upgrade

LDAP: fix filter can be reset and broken after upgrade from OC 5
Allow apps to create custom session handlers.
[backport] [stable6] Skip filescan but execute hooks

Backport of #8607
Merge pull request #8850 from owncloud/stable6_backport_8607

[backport] [stable6] Skip filescan but execute hooks
Merge pull request #8847 from owncloud/stable6_backport_8557

Stable6 backport of #8557