* Makefile.in (actual-all): Reword build failure advice.

* src/bytecode.c (exec_byte_code, syms_of_bytecode):
* src/font.c (syms_of_font):
* src/hbfont.c (uni_combining):
* src/xfns.c (Fx_display_backing_store, Fx_display_visual_class)
(x_create_tip_frame, Fx_show_tip, syms_of_xfns):
* src/xfont.c (xfont_supported_scripts, xfont_driver)
(syms_of_xfont):
* src/xsmfns.c (Fhandle_save_session, syms_of_xsmfns): Remove
calls to intern with a static string.

Run "TZ=UTC0 admin/update-copyright".

Fvector is less error-prone than make_uninit_vector, as it
avoids the possibility of a GC crash due to an uninitialized
vector.  So prefer Fvector to make_uninit_vector when this is
easy (and when there's no significant performance difference).
Inspired by a suggestion by Pip Cet in:
https://lists.gnu.org/r/emacs-devel/2020-08/msg00313.html
* src/ccl.c (Fregister_ccl_program):
* src/ccl.c (Fregister_ccl_program):
* src/charset.c (Fdefine_charset_internal):
* src/font.c (Fquery_font, Ffont_info, syms_of_font):
* src/fontset.c (font_def_new, Fset_fontset_font):
* src/ftfont.c (ftfont_shape_by_flt):
* src/hbfont.c (hbfont_shape):
* src/macfont.m (macfont_shape):
* src/search.c (Fnewline_cache_check):
* src/xfaces.c (Fx_family_fonts):
* src/xfns.c (Fx_window_property_attributes):
Prefer Fvector to make_uninit_vector when either is easy.
* src/fontset.c (font_def_new): Now a function with one less
arg instead of a do-while macro, and renamed from FONT_DEF_NEW.
All uses changed.

* src/hbfont.c (hbfont_shape): Don't use DIRECTION if the current
buffer has bidi reordering disabled.  (Bug#41005)

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

* src/hbfont.c (hbfont_shape): Don't assume LGLYPH_TO is
always a fixnum.
* src/fontset.c (fontset_find_font): A cleaner test for
matching charset_id.

* src/hbfont.c: Include hb-ot.h.
[HAVE_NTGUI]: Add DEF_DLL_FN and #define for hb_tag_to_string,
hb_font_get_face, hb_ot_layout_table_get_script_tags,
hb_ot_layout_table_get_feature_tags, hb_ot_layout_script_get_language_tags,
and hb_ot_layout_language_get_feature_tags.
(hbfont_init_w32_funcs) [HAVE_NTGUI]: Add LOAD_DLL_FN for them.
(hbfont_otf_features, hbfont_otf_capability): New functions.

* src/font.h (hbfont_otf_capability) [HAVE_HARFBUZZ]: Add extern.

* src/ftcrfont.c (syms_of_ftcrfont_for_pdumper) [HAVE_HARFBUZZ]:
* src/ftfont.c (syms_of_ftfont_for_pdumper) [HAVE_HARFBUZZ]:
* src/w32uniscribe.c (syms_of_w32uniscribe_for_pdumper) [HAVE_HARFBUZZ]:
* src/xftfont.c (syms_of_xftfont_for_pdumper) [HAVE_HARFBUZZ]: Populate
otf_capability method with hbfont_otf_capability.