Allow to send SIGQUIT via Ctrl+BREAK (patch included)

[Christopher Faylor]

On Fri, Nov 25, 2005 at 08:43:43PM +0100, Christian Franke wrote:
>OK, let's forget the patch ;-)

Actually, I have done some more testing myself and Windows doesn't work
the way that I remembered.  It seems like CTRL-BREAK isn't handled by
signal(SIGINT, ...).  So, I was wrong about this.  I really should have
tested how it worked before rejecting your patch out of hand.

So, this code is probably just reflecting my misperceptions of what
Windows was doing.  I'll add your patch as it improves Cygwin's
functionality.

Thanks again for providing it.

cgf