Restore Emacs 23 display-buffer functions and options.

Restore Emacs 23 display-buffer functions and options.

* window.el (display-buffer-window): Rewrite doc-string.
(display-buffer-record-window): New function.
(display-buffer-macro-specifiers)
(display-buffer-even-window-sizes, display-buffer-set-height)
(display-buffer-set-width, display-buffer-in-window)
(display-buffer-reuse-window, display-buffer-split-specifiers)
(display-buffer-side-specifiers, display-buffer-split-window-1)
(display-buffer-split-window, display-buffer-split-atom-window)
(display-buffer-pop-up-window, display-buffer-pop-up-frame)
(display-buffer-pop-up-side-window, display-buffer-in-side-window)
(display-buffer-other-window-means-other-frame)
(display-buffer-normalize-special)
(display-buffer-normalize-default)
(display-buffer-normalize-argument)
(display-buffer-normalize-alist-1, display-buffer-normalize-alist)
(display-buffer-normalize-specifiers, display-buffer-frame)
(display-buffer-same-window, display-buffer-same-frame)
(display-buffer-other-window)
(display-buffer-same-frame-other-window)
(display-buffer-other-frame, pop-to-buffer-same-window)
(pop-to-buffer-same-frame, pop-to-buffer-other-window)
(pop-to-buffer-same-frame-other-window, pop-to-buffer-other-frame)
(switch-to-buffer-same-frame)
(switch-to-buffer-other-window-same-frame)
(display-buffer-alist-of-strings-p, display-buffer-alist-add)
(display-buffer-alist-set-1, display-buffer-alist-set-2)
(display-buffer-alist-set): Remove.
(display-buffer-function, special-display-buffer-names)
(special-display-regexps, special-display-function): In
doc-string refer to display-buffer-window and quit-restore
parameter.
(pop-up-frame-alist, pop-up-frame-function, special-display-p)
(special-display-frame-alist, special-display-popup-frame)
(same-window-buffer-names, same-window-regexps, same-window-p)
(pop-up-frames, display-buffer-reuse-frames, pop-up-windows)
(split-window-preferred-function, split-height-threshold)
(split-width-threshold, window-splittable-p)
(split-window-sensibly, window--try-to-split-window)
(window--frame-usable-p, even-window-heights)
(window--even-window-heights, window--display-buffer-1)
(window--display-buffer-2, display-buffer-other-frame): Restore
old Emacs 23 code, order and doc-strings where applicable.
(display-buffer-default, display-buffer-assq-regexp): New functions.
(display-buffer-alist): Rewrite doc-string.
(display-buffer-default-action)
(display-buffer-overriding-action): New variables.
(display-buffer, switch-to-buffer): Rewrite.
(pop-to-buffer): Restore Emacs 23 behavior but use
window-normalize-buffer-to-display.
(switch-to-buffer-other-window, switch-to-buffer-other-frame):
Restore Emacs 23 behavior but use
window-normalize-buffer-to-switch-to.
(pop-to-buffer-same-window): Rewrite.
(pop-to-buffer-other-window, pop-to-buffer-other-frame): Rewrite
using Emacs 23 options.

* org-compat.el (org-pop-to-buffer-same-window): Remove LABEL
argument from pop-to-buffer-same-window call.