New SMB storage backend

apps/files_external/3rdparty/autoload.php

apps/files_external/3rdparty/composer.json

apps/files_external/3rdparty/composer.lock

apps/files_external/3rdparty/composer/ClassLoader.php

apps/files_external/3rdparty/composer/autoload_classmap.php

.../files_external/3rdparty/composer/autoload_namespaces.php

apps/files_external/3rdparty/composer/autoload_psr4.php

apps/files_external/3rdparty/composer/autoload_real.php

apps/files_external/3rdparty/composer/installed.json

apps/files_external/3rdparty/icewind/smb/.gitignore

apps/files_external/3rdparty/icewind/smb/.travis.yml

apps/files_external/3rdparty/icewind/smb/LICENSE.txt

apps/files_external/3rdparty/icewind/smb/README.md

apps/files_external/3rdparty/icewind/smb/composer.json

apps/files_external/3rdparty/icewind/smb/src/Connection.php

apps/files_external/3rdparty/icewind/smb/src/ErrorCodes.php

...party/icewind/smb/src/Exception/AccessDeniedException.php

...arty/icewind/smb/src/Exception/AlreadyExistsException.php

...rty/icewind/smb/src/Exception/AuthenticationException.php

...l/3rdparty/icewind/smb/src/Exception/ConnectException.php