FTP LIST command

Intro

FTP has several RFC: each one introduces new commands to compensate with previous broken or limited commands.

The LIST command has several problems. For example some (most?) servers do not seem to support LIST path with a path that contains a space. Most clients set the path using CWD path and then call LIST instead or better, use the MSLD command which was introduced in RFC 3659 and doesn't appear to have such problem.

Since node-ftp which we use for react-ftp only supports the LIST command we cannot use MSLD so have to stick to the CWD hack. This can be a problem since we don't always want to change the CWD: for example when constructing the file list for a batch.