Implemented display ids for multiple emacsclients on the same tty. Plus assorted...

Implemented display ids for multiple emacsclients on the same tty.  Plus assorted bugfixes.

* lisp/frame.el (make-frame-on-display): Update doc.
(make-frame): Handle display-id parameter.  Update doc.
(frames-on-display-list): Update for display ids.
(framep-on-display): Ditto.
(suspend-frame): Use display-name, not frame-tty-name.
(selected-display): New function.

* lisp/server.el (server-delete-client): Use delete-display, not delete-tty.
(server-tty-live-p, server-handle-delete-tty): Removed.
(server-handle-delete-frame): Delete tty clients, if needed.
(server-process-filter): Set the display parameter, and use it when appropriate.
(server-handle-suspend-tty): Use the display parameter.
(server-start, server-unload-hook): Removed obsolete delete-tty hook.

* lisp/talk.el (talk): Always use talk-add-display.
(talk-add-tty-frame, talk-handle-delete-tty): Removed.
(talk-handle-delete-frame): New function.
(talk-add-display): Open a new frame only if parameter was not a frame.

* src/dispextern.h (get_display, Fdisplay_tty_type):  New prototypes.
(Fframe_tty_type): Removed.

* src/dispnew.c (init_display): Use Fdisplay_tty_type, not Fframe_tty_type.

* src/frame.c (Qdisplay_id, Qdisplay_live_p): New symbols.
(make_terminal_frame): Get display as a parameter.
(Fmake_terminal_frame): Get/create display here; pass it to
make_terminal_frame.
(Fframe_display): New function.
(Fdelete_frame): Stop if the hook deleted the frame.
(syms_of_frame): Register new stuff.

* src/frame.h (Qdisplay_id, Qdisplay_live_p, make_terminal_frame):
Updated prototypes.

* src/keyboard.c (interrupt_signal): Updated comment.

* src/term.c (Vdelete_tty_after_functions): Removed variable.
(Qframe_tty_name, Qframe_tty_type): Removed.
(next_display_id): New var.
(tty_ring_bell): Don't do anything on suspended frames.
(Ftty_display_color_p, Ftty_display_color_cells): Doc update.
(get_display): New function.
(get_tty_display): Use it.
(get_named_tty_display): Ignore suspended displays.
(Fframe_tty_name): Renamed to Fdisplay_name.  Handle all kinds of
displays.
(Fframe_tty_type): Renamed to Fdisplay_tty_type.
(init_initial_display): Set display name.
(term_init): Allow more displays on the same device.  Set display name.
(Fdelete_tty): Removed.
(delete_tty): Don't run hooks.
(create_display): Set display id.
(delete_display): Free display name.
(Fdelete_display, Fdisplay_live_p, Fdisplay_list): New functions.
(Fsuspend_tty): Call hook with display id.  Doc update.
(Fresume_tty): Refuse to resume when there is already an active display
on the same device.  Call hook with display id.  Doc update.
(syms_of_term): Reflect above changes.

* src/termhooks.h (struct display): Added `id' and `name' members.
(DISPLAY_ACTIVE_P): New macro.

* src/xfns.c (check_x_display_info): Handle display ids.
(Fx_create_frame): Try to get display from `display-id' parameter.

* src/xterm.c (x_term_init): Set display name.
(x_delete_display): Handle the case when `font_table' is NULL.

git-archimport-id: lorentey@elte.hu--2004/emacs--multi-tty--0--patch-207