[BRLTTY] USB2Serial under Linux

[Hermann]

Here's the result of lsmod regarding pl2303:

pl2303                 17284  0
usbserial              26700  1 pl2303
usbcore               108320  8
pl2303,usbserial,usbhid,usb_storage,ohci_hcd,uhci_hcd,ehci_hcd

Hermann