Add unit test for multi-user configuration loading
Merge pull request #9675 from owncloud/stable6-9647

[stable6] Add unit test for multi-user configuration loading
clearify the use-case of this app

Backport of https://github.com/owncloud/core/commit/8a24e1eb9624 to stable7
Merge pull request #10315 from owncloud/clarify-encryption-descripti

clearify the use-case of this app
backport of #9848

Fix memberOf detection. Fixes: #9835

Conflicts:
	apps/user_ldap/lib/wizard.php

Fix remarks in #9848

Conflicts:
	apps/user_ldap/lib/wizard.php

Fix initializing in #9848

do not change var names here
 in case $_POST['itemSourceName'] does not exist we simply default it to null
Merge pull request #10344 from owncloud/backport-10096-stable6

 in case $_POST['itemSourceName'] does not exist we simply default it to...
fix detection of system wide mount points
add unit tests
fix broken variable name, recoveryPasswordSupported is now recoveryEnabledForUser