title: g_serial gadget with handshake
body: <p>I have application on Windows-host that connects to board-device via RS232 with full handshake (RTS, CTS, DTR). I want to replace the RS232 with USB now. I use board with embedded linux and USB device (g_serial) module. I get all the data on terminal both sides, but application can't handle it (lack of handshake signals). 
  How is it possible to handle it ? (Host or device side)
  Maybe there are some handshake "emulators" that cares about handshake on PC-host side ?</p>
  
  <p>BR
  Bartlomiej Grzeskowiak</p>