Feature request: Write text output when fails to connect, describing the error.

For a year I couldn't connect to some server, wfreerdp.exe just kept exiting. Didn't write any reason upon exiting. Only now after many tries, I managed to connect using "/cert-ignore" command line parameter. If the wfreerdp.exe would have told me a year ago I failed to connect due to a certificate problem, I could have connected to my server a year ago.