According to the man page on macOS poll currently doesn't support
devices. This includes `/dev/tty`.
In this use case poll will returned immediately indicating that
something can be read but the following read returned `-1`
(with errno set to EAGAIN).
Using select on macOS for passphrase reading prevents this problem.
On windows freerdp_interruptible_getc did not work at all. Fix this so
that reading characters works. This still does not hide input for
passwords or is actually interruptible, but at least it reads the data
correctly.
* add option to build as console by using WITH_WIN_CONSOLE
* add passphrase read from stdin for Win32
* fix windows authentication with stdin password
* allow redirected stdin to be used for stdin input
* flush stdout to help with automation
* use stdin when /from-stdin is present
* add error log for stdin flag but stdin redirected
