Return proper status code in case of a CORS exception

don't move keys if the key where already moved in a previous migration run

When returning a 500 statuscode external applications may interpret this as an error instead of handling this more gracefully. This will now make return a 401 thus.

Fixes https://github.com/owncloud/core/issues/17742

fix runtime caching in ldap's user manager, fixes #17631

Allow app check code for deprecated classes

Allow upgrade of not enabled apps

Fix occ config commands

Update ringphp to 1.1.0 for PHP 7 compatibility

make sure that we always detect legacy files correctly

The external directories should get the correct icon in filelist

Fixing 'Undefined index: REMOTE_ADDR' 

Fix browser compatibility issue for element.closest()

[autotest] timeout oracle docker startup after 2 minutes

Missing memcache should not cause occ hard-fail

By default, all are enabled, but specific ones can be selected through command
line options.

Throw lock exceptions if remote share returned 423 status code