ssh/terminal: stop using ENABLE_LINE_INPUT

ReadConsole does not read more than 254 bytes when ENABLE_LINE_INPUT is
enabled.

Fixes golang/go#36071

Change-Id: If5c160404b855387a80f1d57638aac3f2db1a097
Reviewed-on: https://go-review.googlesource.com/c/crypto/+/212377
Run-TryBot: Alex Brainman <alex.brainman@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Alex Brainman <alex.brainman@gmail.com>
2 files changed