Support for opening X frames from a tty session.

Support for opening X frames from a tty session.

lisp/cus-face.el (custom-declare-face): Handle multiple concurrent
display methods correctly.

lisp/faces.el (x-create-frame-with-faces): Set the window-system frame
parameter instead of frame-creation-function.
(tty-create-frame-with-faces): Ditto.

lisp/frame.el (frame-creation-function): Removed.
(frame-creation-function-alist): New variable.
(frame-initialize): Use initial-window-system instead of window-system.
Add window-system parameter to initial-frame-alist.
Removed tty initialization, it was moved to frame-creation-function-alist.
(frame-notice-user-settings): Use initial-window-system instead of window-system.
(make-frame-on-display): Make sure term/x-win is loaded.  Added
window-system parameter for make-frame.
(make-frame-on-tty): Removed unnecessary autoload declaration.  Added
window-system parameter for make-frame.
(make-frame): Use frame-creation-function-alist to determine the
function to use depending on the specified window system.
(select-frame-by-name): Use the window-system function instead of the
variable.

lisp/startup.el (window-system):  New variable (previously built-in,
now frame-local).
(normal-top-level, command-line): Use initial-window-system instead
of window-system.

lisp/loadup.el:  Load startup.el before faces.el, for the
window-system variable.

lisp/term/x-win.el: Check for the x-create-frame function instead of
window-system to see if X is available.  Don't exit Emacs if the
display can not be opened when X is not the initial display method.
Set up frame-creation-function-alist instead of
frame-creation-function.  Provide the x-win feature.

src/dispnew.c (Vwindow_system): Renamed to Vinitial_window_system.
(init_display, syms_of_display): Updated to use Vinitial_window_system
instead of Vwindow_system.

src/emacs.c (shut_down_emacs): Updated to use Vinitial_window_system
instead of Vwindow_system.

src/keyboard.c (Fset_input_mode): Call reset_all_sys_modes, not
reset_sys_modes.  Ditto for init_all_sys_modes.  Process the quit
parameter correctly.

src/sysdep.c (init_sys_modes, reset_sys_modes): Unconditionally set up
the terminal.  We don't get called if there is nothing to do anymore.
(sys_select): Use Vinitial_window_system, not Vwindow_system.

src/window.h (Vwindow_system): Renamed to Vinitial_window_system.

src/xfns.c (Fx_create_frame): Don't check_x.  We initialize it anyway.
(x_display_info_for_name, Fx_open_connection): Don't look at
Vinitial_window_system.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-54