class walk_method :This FTP method walks to the target directory:
[ `Dir of string | `File of string | `Stay ] ->
`File name: The
nameis interpreted as slash-separated path. It is always interpreted relative to the home directory of the user (i.e. the directory after login), even if it begins with a slash. The FTP command walks to the directory containing
`Dir name: The FTP command walks to the directory
name(same syntax as for
`Stay: The FTP command does nothing (stays in the current directory).