* fhandler.h (dev_console): New class.

* fhandler.h (dev_console): New class.
(fhandler_console::dev_state): New class element.
(fhandler_console::mouse_aware): Use dev_state element.
(fhandler_console::get_tty_stuff): Declare new function.
* fhandler_console.cc: Use dev_state fhandler_console element, throughout.
(fhandler_console::get_tty_stuff): Move to fhandler_console class.  Incorporate
dev_console information.  Move constructor stuff here.