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Add documentation about serial port access.

emacs.texi, misc.texi: Add documentation about serial port access.

elisp.texi, internals.texi, processes.texi: Add documentation about
serial port access.

These changes add serial port access.
(term-update-mode-line): Modify.
(serial-port-is-file-p, serial-nice-speed-history)
(serial-no-speed, serial-mode-line-speed-menu)
(serial-mode-line-config-menu): New variables and constants.
(serial-name-history, serial-speed-history)
(serial-supported-or-barf, serial-read-name, serial-read-speed)
(serial-term, serial-speed, serial-mode-line-speed-menu-1)
(serial-mode-line-speed-menu, serial-update-speed-menu)
(serial-mode-line-config-menu-1, serial-mode-line-config-menu)
(serial-update-config-menu): New functions.

font-driver at first.

change of font_score and font_sort_entites.

LFACE_FOUNDRY_INDEX.

weight, slant, width, and size.
(font_sort_entites): Adjusted for the above change.  Reflect the
order of font-driver to scores.
(font_list_entities): Don't check alternate_familes here.
(font_clear_prop): Handle foundry.
(font_update_lface): Don't parse "foundry-family" form here.
Handle FONT_FOUNDRY_INDEX.
(font_find_for_lface): Likewise.  Handle alternate families here.
(font_open_for_lface): Pay attention to size in ENTITY.
(font_open_by_name): Simplified by calling font_load_for_lface.
(free_font_driver_list): Delete it.
(font_update_drivers): Preserve the order of backends.
(syms_of_font): Setting of sort_shift_bits adjusted for the change
of font_score and font_sort_entites.

(check_lface_attrs): Check foundry.
(set_lface_from_font): Don't parse "FOUNDRY-FAMILY" from.
(merge_face_vectors): Check foundry.
(merge_face_ref): Likewise.
(Finternal_set_lisp_face_attribute): Likewise.
(x_update_menu_appearance): Likewise.
(Finternal_get_lisp_face_attribute): Likewise.
(lface_hash): Likewise.
(lface_same_font_attributes_p): Likewise.
(x_supports_face_attributes_p): Likewise.
(tty_supports_face_attributes_p): Likewise.
(Finternal_set_alternative_font_family_alist): Intern strings.
(Finternal_set_alternative_font_registry_alist): Downcase strings.
(realize_default_face): Set LFACE_FOUNDRY (lface).

(face-x-resources): Add :foundry.
(face-valid-attribute-values): Likewise.
(face-attribute-name-alist): Likewise.
(describe-face): Likewise.

Author: Emanuele Giaquinta <emanuele.giaquinta@gmail.com>

* unexmacosx.c (unexec_free): Ignore a NULL argument.

* character.c (Fmultibyte_char_to_unibyte): Obey the docstring.
* regex.c (RE_CHAR_TO_UNIBYTE): Use the new macro.
(WEAK_ALIAS): Simplify.
* syntax.c (skip_chars): Don't mark non-byte chars in the fastmap
when searching a unibyte buffer.

(longlines-re-search-forward): Use a smarter search-spaces-regexp.

(longlines-search-backward, longlines-re-search-forward): Use a
smarter search-spaces-regexp.

x-select-font.

Revision: emacs@sv.gnu.org/emacs--devo--0--patch-1232

(x-display-pixel-width, x-display-pixel-height):
Define for compiler, for builds without X.

(x-parse-geometry, x-resource-name)
(x-get-selection-internal, tool-bar-mode, set-fontset-font)
(new-fontset, x-display-list, x-open-connection, x-get-resource):
Define for compiler, for builds without X.