Merge pull request #8003 from owncloud/extstorage-sftp-upgradephpseclib

apps/files_external/3rdparty/phpseclib/LICENSE

apps/files_external/3rdparty/phpseclib/README.md

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

apps/files_external/3rdparty/phpseclib/composer.lock

...files_external/3rdparty/phpseclib/phpseclib/Crypt/AES.php

...iles_external/3rdparty/phpseclib/phpseclib/Crypt/Base.php

..._external/3rdparty/phpseclib/phpseclib/Crypt/Blowfish.php

...files_external/3rdparty/phpseclib/phpseclib/Crypt/DES.php

...iles_external/3rdparty/phpseclib/phpseclib/Crypt/Hash.php

...files_external/3rdparty/phpseclib/phpseclib/Crypt/RC2.php

...files_external/3rdparty/phpseclib/phpseclib/Crypt/RC4.php

...files_external/3rdparty/phpseclib/phpseclib/Crypt/RSA.php

...es_external/3rdparty/phpseclib/phpseclib/Crypt/Random.php

..._external/3rdparty/phpseclib/phpseclib/Crypt/Rijndael.php

...external/3rdparty/phpseclib/phpseclib/Crypt/TripleDES.php

...s_external/3rdparty/phpseclib/phpseclib/Crypt/Twofish.php

...files_external/3rdparty/phpseclib/phpseclib/File/ANSI.php

...files_external/3rdparty/phpseclib/phpseclib/File/ASN1.php

...files_external/3rdparty/phpseclib/phpseclib/File/X509.php

...external/3rdparty/phpseclib/phpseclib/Math/BigInteger.php