Merge pull request #16237 from owncloud/file-locking

apps/files_sharing/lib/sharedstorage.php

config/config.sample.php

lib/base.php

lib/private/connector/sabre/directory.php

lib/private/connector/sabre/exception/filelocked.php

lib/private/connector/sabre/file.php

lib/private/connector/sabre/filesplugin.php

lib/private/connector/sabre/objecttree.php

lib/private/files/storage/common.php

lib/private/files/storage/storage.php

lib/private/files/storage/wrapper/jail.php

lib/private/files/storage/wrapper/wrapper.php

lib/private/files/view.php

lib/private/lock/memcachelockingprovider.php

lib/private/lock/nooplockingprovider.php

lib/private/memcache/factory.php

lib/private/memcache/null.php

lib/private/server.php

lib/public/files/storage.php

lib/public/iservercontainer.php