* src/xfaces.c (Finternal_color_values_from_color_spec): Rename to...
(Fcolor_values_from_color_spec): ...this.  Callers changed.
Rename the argument to SPEC and improve the doc string.
(parse_color_spec, parse_float_color_comp, parse_hex_color_comp):
Improve commentary.
(parse_color_spec): Rename the argument S to SPEC.

* etc/NEWS: Mention 'color-values-from-color-spec'.

Use a single parser of color strings in the #RGB, rgb:R/G/B and
rgbi:R/G/B formats, replacing four existing ones.  Previously,
error-checking was spotty, handling of the rgbi: format not always
present, and normalization of the result was sometimes incorrect.

* src/dispextern.h: New prototype.
* src/xfaces.c (parse_hex_color_comp, parse_float_color_comp)
(parse_color_spec, Finternal-color_values_from_color_spec): New functions.
* test/src/xfaces-tests.el (xfaces-internal-color-values-from-color-spec):
New test.
* lisp/term/tty-colors.el (tty-color-standard-values):
Use internal-color-values-from-color-spec, replacing old parser.
* src/nsterm.m (ns_get_color):
* src/w32fns.c (x_to_w32_color):
* src/xterm.c (x_parse_color): Use parse_color_spec, replacing old
parsers.
(HEX_COLOR_NAME_LENGTH): Remove #define.

* lisp/term/x-win.el (x-gtk-stock-map): One more icon mapping.

* lisp/gnus/message.el (message-tool-bar-retro):
Use non-Gnus-specific icon.

* lisp/term/x-win.el (x-gtk-stock-map):
Use more themed icons (bug#40990).

This takes care of the most trivial cases, but there are more that
could be easily converted.

* lisp/term/bobcat.el:
* lisp/term/cygwin.el:
* lisp/term/konsole.el:
* lisp/term/linux.el:
* lisp/term/vt100.el:
* lisp/term/vt200.el: Use lexical-binding.

* src/w32image.c: New file.
* src/w32term.h: Add prototypes of 'w32_load_image',
'w32_gdiplus_startup', 'w32_gdiplus_shutdown', and
'w32_query_frame_background_color'.
* src/w32term.c (w32_query_frame_background_color): No longer
static.
* src/w32.c (term_ntproc) [HAVE_GDIPLUS]: Call
'w32_gdiplus_shutdown'.
* src/image.c (struct image_type) <valid_p>: Accept an additional
argument, the image type.  All implementations changed.
(init_native_image_functions, native_image_p, native_image_load)
[HAVE_NATIVE_IMAGE_API]: New methods for "native image type".
(initialize_image_type) [HAVE_NATIVE_IMAGE_API]: Call
'init_native_image_functions'.
(image_types) [HAVE_NATIVE_IMAGE_API]: Add settings for native
image API.
(lookup_image_type) [HAVE_NATIVE_IMAGE_API]: Initialize native
functions if needed.

* lisp/term/w32-win.el (dynamic-library-alist): Add gdiplus and
shlwapi.

* etc/NEWS: Announce the new feature.

* configure.ac (native-image-api): New option, OFF by default.
(HAVE_NATIVE_IMAGE_API): If native-image-api is selected, add
w32image.o to W32_OBJ.

rxvt-unicode uses the same escape sequences as xterm so just re-use
the xterm functions to enable them.  The `xterm-rxvt-function-map`
keymap already has

    (define-key map "\e[200~" [xterm-paste])

so we're already handling the paste sequence and only need to enable it.
Tested on rxvt-unicode version 9.22.

(rxvt-set-window-title): New var.
(terminal-init-rxvt): Use it; enable bracketed paste mode;
run terminal-init-rxvt-hook.

Run "TZ=UTC0 admin/update-copyright $(git ls-files)".

* lisp/term/ns-win.el (ns-insert-working-text):
(ns-delete-working-text): Change how working text is deleted to handle
changed order of operations.
* src/nsterm.m ([EmacsView insertText:]): Move deletion of working
text until after insertion of new text.

Copyright-paperwork-exempt: yes