(Vw32_recognize_altgr): New variable.

(Vw32_recognize_altgr): New variable.
(dumpglyphs): Update from xterm.c.
(w32_ring_bell): Flash window, don't just reset its state.
(dumprectangle, show_mouse_face, x_draw_single_glyph): Use new
args to dumpglyphs.
(my_set_foreground_window): New function.
(w32_condemn_scroll_bars): Mark all as condemned scroll bars.
(w32_redeem_scroll_bar): Look through all scroll bars.
(w32_judge_scroll_bars): Don't clear out condemned list.
(w32_read_socket): Clip window after frame has been restored.
(x_focus_on_frame, x_raise_frame): Use my_set_foreground_window.
(syms_of_w32term): Define Vw32_recognize_altgr.