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

This reverts commit daefd6771a4879bb8e71ea67f69522700155df01.

* src/sfnt.c (sfnt_read_OS_2_table): Restore realignment after
s_family_class, as it occupies byte 32, not 34.  Reported by Pip
Cet <pipcet@protonmail.com>.

* src/sfnt.c (sfnt_read_OS_2_table):

* src/sfnt.h (struct sfnt_OS_2_table): Don't redundantly realign
after s_family_class.

* src/sfnt.c (sfnt_read_simple_glyph): Correct alignment errors.
(PUSH2_UNCHECKED): Don't shift negative signed value to the
left.
(SLOOP): Permit LOOP to be set to 0, which inhibits the
execution of instructions it affects.
(sfnt_address_zp2, sfnt_address_zp1, sfnt_address_zp0): Permit X
and Y to be NULL.
(sfnt_dot_fix_14): Guarantee that the final value is rounded to
negative infinity, not zero.
(sfnt_project_zp1_zp0_org): New function.
(sfnt_interpret_mdrp): Avoid rounding issues by computing
original distance from unscaled coordinates, if at all possible.
(sfnt_interpret_simple_glyph, sfnt_interpret_compound_glyph_2):
Set zone->simple.
(all_tests) <LOOP>: Update test.
(sfnt_identify_instruction, main): Adjust tests.

* src/sfnt.h (struct sfnt_interpreter_zone): New field simple.

* src/sfnt.c (struct sfnt_compound_glyph_context): New fields
holding the positions of both phantom points.
(sfnt_decompose_compound_glyph): New argument METRICS_RETURN;
return the metrics of components with USE_MY_METRICS within this
field.
(sfnt_decompose_glyph): New argument METRICS_RETURN, which
serves the same purpose.
(sfnt_build_glyph_outline): Apply glyph advance and origin
distortion to METRICS, and return the metrics as altered by
compound glyphs in there.
(sfnt_lookup_glyph_metrics): Trim away two unused parameters,
PIXEL_SIZE and HEAD, whose functionality has been superseeded by
sfnt_scale_metrics and the implicit scaling the interpreter
performs.
(sfnt_interpret_compound_glyph_2): Save phantom points within
fields provided to that end in CONTEXT.
(sfnt_interpret_compound_glyph_1): Save and source phantom
points for each glyph to and from the context.
(sfnt_test_get_metrics, main): Adjust tests correspondingly.

* src/sfnt.h: Update prototypes.

* src/sfntfont.c (sfntfont_get_metrics): Remove obsolete
parameters.
(sfntfont_get_glyph_outline): Don't change temp by the metrics
distortions, which is now the task of sfnt_decompose_glyph.

* src/sfnt.h (SFNT_ROUND_FIXED): New macro.

* src/sfntfont.c (sfntfont_get_glyph_outline): Don't apply
advance width distortion before the glyph is instructed or
decomposed.  Round advance width as measured between both
phantom points subsequent to instruction code execution.
(sfntfont_draw): Don't take the advance's ceiling when advancing
origin point.

* src/sfnt.c (sfnt_read_glyph): Clear advance and origin
distortion returning an empty glyph.
(sfnt_build_instructed_outline): New parameter *ADVANCE_WIDTH,
in which the glyph's advance width is saved.
(sfnt_interpret_compound_glyph_1): Refine commentary.
(sfnt_verbose, main): Adjust tests.

* src/sfnt.h: Update prototypes correspondingly.

* src/sfntfont.c (sfntfont_get_glyph_outline): If an instructed
outline is available, derive the advance and lbearing from the
measurements within.
(sfntfont_probe_widths): Call sfntfont_measure_pcm to establish
average widths.
(sfntfont_open): Do so after instruction code initialization
completes.
(sfntfont_measure_pcm): Revise commentary.

* src/sfnt.c (sfnt_curve_is_flat): Tighten threshold for flat
curves.
(sfnt_insert_raster_step): Rewrite loop for clarity.
(sfnt_poly_set_steps): New function; fill small spans with a
plain unexceptional loop rather than memset.
(sfnt_poly_steps): Call that function.
(sfnt_verbose, main): Adjust tests such that the scaler can be
selected at runtime.

* src/sfnt.h: Update prototypes.

* src/sfntfont.c (sfntfont_get_glyph_raster)
(syms_of_sfntfont) <sfnt_raster_glyphs_exactly>: New variable.