Merge pull request #3605 from nextcloud/single-user

apps/dav/lib/Connector/Sabre/MaintenancePlugin.php

.../dav/tests/unit/Connector/Sabre/MaintenancePluginTest.php

config/config.sample.php

core/Command/Encryption/DecryptAll.php

core/Command/Encryption/EncryptAll.php

core/Command/Maintenance/SingleUser.php

core/register_command.php

cron.php

lib/base.php

lib/composer/composer/autoload_classmap.php

lib/composer/composer/autoload_static.php

ocs/v1.php

public.php

tests/Core/Command/Encryption/DecryptAllTest.php

tests/Core/Command/Encryption/EncryptAllTest.php

tests/Core/Command/Maintenance/SingleUserTest.php