[PATCH 0/2] MR1867: Better handle ctrl-\ and ctrl-break in conhost.exe.

[eric pouech (＠epo)]

The first intend of this serie is that CUI app in non processed input
mode should not die when using the ctrl-\ key stroke.

This series:
- implements ctrl-pause/break in conhost.exe (in processed mode) by 
  generating the proper console event
- maps for unix-console ctrl-\ into a ctrl-pause/break key stroke.

Code change is relatively small, and fixes an annoying behavior in
unix consoles (see bug report).

The series could have been a bit smaller by not adding ctrl-break
support in user32 console, but:
- it's cleaner that way
- it still requires the server changes (which may be perhaps the
  most questionnable here, esp. the termios change).

So a valid (IMO) candidate for 8.0.