Bitvise WinSSHd 5 support

Bitvise modified the way their WinSSHd server uses the terminal, which leads to some issues with Genero Desktop Client (GDC) Terminal Strings.

GDC has been adapted to work with WinSSHd 5.0.9 (some changes in the server have been done by Bitvise too, so you'll need to upgrade the server part to at least version 5.0.9.)