Delphi v2.1.10736

- Prevent setting passwords with unsupported characters (@ and /)
- Fix behavior of YSerialPort.readByte when there is no data available
- Fix Prog-FirmwareUpdate example to properly handle VirtualHub-4web and VirtualHub-V2
- Fix potential short write on socket
- Fix possible incorrect timeout values in YAPI::PreregisterHub
- Fix redirection handling with IPv6 address
