The REST command is now issued only if the server declares explicitly its support in the FEAT command response. Other enhancements have been made in the download/upload error handling routine and in the UnixListParser.
In FTPS and FTPES modes, the client now issues a "PBSZ 0" command before sending the "PROT P" one. Some servers require it. A minor API change was made: the streamLength information is no longer required by the upload method.