Updated patch:

- Try to always do SIZE requests using relative paths.
- Removed changes a related bug report from this patch.

This patch changes Ftp::ftpSize such that it has support for servers that do not allow absolute paths with the SIZE command. That means when sending the command "SIZE /somefile" fails, it will try sending "SIZE somefile" before giving up. See bug report for details.

Installed Ftp server from bug report on an Android device and run tests.