Console API is now used for interactive tty mode. Thus ssh.exe client
can now pass each character to remote side as one types so that programs
like more works correctly. Control-c now will stop the remote program
instead of exiting the ssh.exe.
Fixes issues like cmd.exe shell not handling backspace, control-c.
Control-c is still a work in progress and will be fixed but backspace
processing works. This work when complete will make cmd.exe shell and
powershell work better for interactive users.
Whether LF should be changed to CR-LF is determined by what the remote
sshd server wants. Sequences like ESC[20h is sent by sshd servers in pty
ANSI mode. Unix servers usually want LF and Windows servers CR-LF. Added
simple ANSI data check now for pty use in interactive mode. Need to
expand to simple ANSI engine in future for processing other ANSI
terminal attributes.
pty and tty support was not enabled or working in the code. Without pty
support, ssh client was very non functional - e.g. openssh linux server
prompt would not come through. Now ssh client works much better in
interactive mode ( uses pty).
