* DevNotes: Add entry cgf-000024.

* fhandler.h (dev_console::state): Remove trailing underscore.
(dev_console::args): Ditto.
(dev_console::nargs): Ditto.
(dev_console::info): Eliminate subclass.
(dev_console::dwEnd): New field.
(dev_console::scroll_window): New function.
(dev_console::is_fullscreen): Ditto.
(dev_console::fillin): Rename from fillin_info.
(fhandler_console::scroll_buffer): Rename from scroll_screen.
* fhandler_console.cc: Throughout s/dev_state\.info/dev_state/g.  Accommodate
other name changes.
(dev_console::fillin): Accommodate rename.  Notice max x/y written to.  Forgo
memset if GetConsoleScreenBufferInfo fails.
(fhandler_console::scroll_buffer): Accommodate rename.  Don't treat y
coordinate of zero as top of screen.
(dev_console::is_fullscreen): New function.
(dev_console::scroll_window): Ditto.
(fhandler_console::clear_screen): Just scroll the screen when clearing the
screen in a state where the screen buffer is bigger than the screen.
(fhandler_console::char_command): Try harder to get 'S' and 'T' working in the
presence of a screen buffer.  Use temporary 'n' variable rather than
dev_state.args[0].  Use GNU ?: shortcut method.

winsup/cygwin/DevNotes

@@ -1,3 +1,11 @@
+2014-02-15  cgf-000024
+
+Wow.  It's hard getting the screen handling stuff working correctly when
+there is a screen buffer larger than screen size and vice versa.  These
+changes attempt to use SetConsoleWindowInfo whenever possible so that
+the contents of the screen buffer are never wiped out.  They also fix
+some previously misbehaving "scroll the screen" commands.
+
 2013-06-07  cgf-000023
 
 Given the fact that the signal thread never exits there is no need