Run admin/update-copyright.

Most of this change is to boilerplate commentary such as license URLs.
This change was prompted by ftp://ftp.gnu.org's going-away party,
planned for November.  Change these FTP URLs to https://ftp.gnu.org
instead.  Make similar changes for URLs to other organizations moving
away from FTP.  Also, change HTTP to HTTPS for URLs to gnu.org and
fsf.org when this works, as this will further help defend against
man-in-the-middle attacks (for this part I omitted the MS-DOS and
MS-Windows sources and the test tarballs to keep the workload down).
HTTPS is not fully working to lists.gnu.org so I left those URLs alone
for now.

* src/termchar.h (tty_display_info): Remove TN_max_pairs field,
describing maximum number of terminal background/foreground color pairs.
* src/term.c (tty_default_color_capabilities, tty_setup_colors)
(init_tty): Remove references to TN_max_pairs.

Run admin/update-copyright.

Work around Bug#22884 by rewording comments and strings to avoid ‘(’
at the start of a line unless it starts a function.  This change
is a short-term hack; in the longer run we plan to fix cc-mode’s
performance for C files that have ‘(’ at the start of a line in a
comment or string.

Run admin/update-copyright.

Redo src/*.h so that each include file is idempotent (that is, can
be included multiple times with the latter inclusions having no
effect) and standalone (that is, can be included by itself,
with no include file other than config.h needed as a prerequisite).
This is standard practice in GNU programs nowadays.
* lwlib/lwlib-widget.h, src/buffer.h, src/category.h, src/character.h:
* src/charset.h, src/coding.h, src/commands.h, src/disptab.h:
* src/fontset.h, src/gnutls.h, src/indent.h, src/keymap.h, src/macros.h:
* src/regex.h [emacs]:
* src/syntax.h, src/systty.h, src/termhooks.h:
Include lisp.h, for Lisp_Object.
* src/buffer.h, src/category.h, src/cm.h, src/commands.h, src/disptab.h:
* src/indent.h, src/intervals.h, src/keyboard.h, src/macros.h:
* src/process.h, src/puresize.h, src/region-cache.h, src/syntax.h:
* src/syssignal.h, src/sysstdio.h, src/systty.h, src/termchar.h:
* src/termopts.h, src/tparam.h, src/unexec.h:
Protect against multiple inclusion.
* src/buffer.h: Include character.h, for STRING_CHAR.
* src/emacsgtkfixed.h (struct frame):
* src/fontset.h (struct face):
* src/region-cache.h (struct buffer):
* src/termhooks.h (struct glyph):
* src/xsettings.h (struct x_display_info):
Add possibly-forward decl.
* src/syntax.h: Include buffer.h, for BVAR.
* src/sysselect.h: Include lisp.h, for eassume.
* src/termchar.h: Include <stdio.h>, for FILE.
* src/widget.h: Include <X11/IntrinsicP.h>, for Widget.
* src/xsettings.h: Include <X11/Xlib.h>, for XEvent.

Run admin/update-copyright.

* configure.ac (PTY_OPEN, GC_MARK_SECONDARY_STACK):
Use bool for boolean.
* lib-src/emacsclient.c, lib-src/etags.c, lib-src/hexl.c (FALSE, TRUE):
Remove.  All uses replaced with uncapitalized version.
* lib-src/emacsclient.c (message):
* lib-src/etags.c (make_tag, pfnote, consider_token, make_C_tag, lang_names):
* lib-src/hexl.c (un_flag, iso_flag, endian):
* lib-src/pop.c (pop_debug, pop_open, pop_multi_first, pop_multi_next)
(pop_trash):
Use bool for boolean.
* lib-src/etags.c (bool): Remove.
* lib-src/etags.c (globals, members, declarations, no_line_directive)
(no_duplicates): Use 'int' for boolean values that getopt requires
to be 'int'.  Formerly, these were 'bool' and 'bool' was 'int',
but we can no longer rely on this implementation.
* lib-src/pop.h (struct _popserver): Use bool_bf for boolean bit-fields.
* lwlib/xlwmenuP.h (XlwMenu_part): Use bool_bf for boolean bit-fields.
* src/atimer.h, src/lisp.h, src/syssignal.h, src/syswait.h, src/unexelf.c:
No need to include <stdbool.h>, since conf_post.h does it now.
* src/buffer.h (BUF_COMPUTE_UNCHANGED, DECODE_POSITION)
(BUFFER_CHECK_INDIRECTION, GET_OVERLAYS_AT, PER_BUFFER_VALUE_P)
(SET_PER_BUFFER_VALUE_P):
* src/ccl.c, src/ccl.h (setup_ccl_program):
* src/ccl.h (CHECK_CCL_PROGRAM):
* src/character.h (MAKE_CHAR_UNIBYTE, CHECK_CHARACTER_CAR)
(CHECK_CHARACTER_CDR, CHAR_STRING_ADVANCE, NEXT_CHAR_BOUNDARY)
(PREV_CHAR_BOUNDARY, FETCH_STRING_CHAR_ADVANCE)
(FETCH_STRING_CHAR_AS_MULTIBYTE_ADVANCE)
(FETCH_STRING_CHAR_ADVANCE_NO_CHECK, FETCH_CHAR_ADVANCE)
(FETCH_CHAR_ADVANCE_NO_CHECK, INC_POS, DEC_POS, INC_BOTH)
(DEC_BOTH, BUF_INC_POS, BUF_DEC_POS):
* src/charset.h (CHECK_CHARSET, CHECK_CHARSET_GET_ID)
(CHECK_CHARSET_GET_ATTR, CHECK_CHARSET_GET_CHARSET)
(CHARSET_FAST_MAP_SET):
* src/coding.c (decode_coding_ccl, encode_coding_ccl):
* src/coding.h (CHECK_CODING_SYSTEM, CHECK_CODING_SYSTEM_GET_SPEC)
(CHECK_CODING_SYSTEM_GET_ID, SJIS_TO_JIS, SJIS_TO_JIS2)
(JIS_TO_SJIS, JIS_TO_SJIS2, ENCODE_FILE, DECODE_FILE)
(ENCODE_SYSTEM, DECODE_SYSTEM, ENCODE_UTF_8)
(decode_coding_c_string):
* src/composite.h (COMPOSITION_DECODE_REFS, COMPOSITION_DECODE_RULE):
* src/conf_post.h (has_attribute):
* src/dispextern.h (trace_redisplay_p):
(INC_TEXT_POS, DEC_TEXT_POS, SET_GLYPH_FROM_GLYPH_CODE)
(SET_CHAR_GLYPH, SET_CHAR_GLYPH_FROM_GLYPH)
(SET_GLYPH_FROM_CHAR_GLYPH):
(WINDOW_WANTS_MODELINE_P, WINDOW_WANTS_HEADER_LINE_P)
(FACE_SUITABLE_FOR_ASCII_CHAR_P, FACE_SUITABLE_FOR_CHAR_P)
(PRODUCE_GLYPHS, reset_mouse_highlight, in_display_vector_p)
(cursor_in_mouse_face_p):
* src/dispnew.c (adjust_glyph_matrix, clear_glyph_matrix_rows)
(blank_row, prepare_desired_row)
(build_frame_matrix_from_leaf_window, make_current)
(mirror_make_current, mirrored_line_dance, mirror_line_dance)
(update_window, scrolling_window, update_frame_line):
* src/disptab.h (GLYPH_FOLLOW_ALIASES):
* src/editfns.c (Fformat):
* src/font.h (FONT_WEIGHT_SYMBOLIC, FONT_SLANT_SYMBOLIC)
(FONT_WIDTH_SYMBOLIC, FONT_WEIGHT_FOR_FACE, FONT_SLANT_FOR_FACE)
(FONT_WIDTH_FOR_FACE, FONT_WEIGHT_NAME_NUMERIC)
(FONT_SLANT_NAME_NUMERIC, FONT_WIDTH_NAME_NUMERIC)
(FONT_SET_STYLE, CHECK_FONT, CHECK_FONT_SPEC, CHECK_FONT_ENTITY)
(CHECK_FONT_OBJECT, CHECK_FONT_GET_OBJECT, FONT_ADD_LOG)
(FONT_DEFERRED_LOG):
* src/frame.h (FRAME_W32_P, FRAME_MSDOS_P, FRAME_WINDOW_P):
(FRAME_EXTERNAL_TOOL_BAR, FRAME_EXTERNAL_MENU_BAR, FOR_EACH_FRAME)
(FRAME_MOUSE_UPDATE):
* src/fringe.c (Fdefine_fringe_bitmap):
* src/image.c (x_create_bitmap_from_data, x_create_bitmap_mask)
(x_create_bitmap_from_xpm_data, xpm_load_image):
* src/intervals.h (INTERVAL_HAS_PARENT, INTERVAL_PARENT)
(set_interval_parent, RESET_INTERVAL, COPY_INTERVAL_CACHE)
(MERGE_INTERVAL_CACHE):
* src/keymap.h (KEYMAPP):
* src/lisp.h (eassert, USE_LSB_TAG, CHECK_LISP_OBJECT_TYPE)
(STRING_SET_UNIBYTE, STRING_SET_MULTIBYTE, DEFSYM, PSEUDOVECTORP)
(CHECK_RANGED_INTEGER, CHECK_TYPE_RANGED_INTEGER)
(CHECK_NUMBER_COERCE_MARKER, CHECK_NUMBER_OR_FLOAT_COERCE_MARKER)
(DEFVAR_LISP, DEFVAR_LISP_NOPRO, DEFVAR_BOOL, DEFVAR_INT)
(DEFVAR_BUFFER_DEFAULTS, DEFVAR_KBOARD, QUIT)
(RETURN_UNGCPRO, USE_SAFE_ALLOCA, SAFE_NALLOCA, SAFE_FREE)
(SAFE_ALLOCA_LISP, FOR_EACH_ALIST_VALUE, functionp):
* src/syntax.h (SYNTAX_ENTRY, SYNTAX_WITH_FLAGS, SYNTAX)
(UPDATE_SYNTAX_TABLE_FORWARD, UPDATE_SYNTAX_TABLE_BACKWARD)
(SETUP_BUFFER_SYNTAX_TABLE):
* src/systime.h (timespec_valid_p):
* src/term.c (save_and_enable_current_matrix):
* src/window.h (WINDOW_MENU_BAR_P, WINDOW_TOOL_BAR_P):
* src/xdisp.c (in_display_vector_p, display_tool_bar_line)
(redisplay_internal, try_window_reusing_current_matrix)
(sync_frame_with_window_matrix_rows, try_window_id)
(display_menu_bar, display_tty_menu_item, display_mode_line)
(coords_in_mouse_face_p, cursor_in_mouse_face_p):
* src/xmenu.c (xmenu_show):
* src/xterm.c (use_xim, x_term_init):
* src/xterm.h (XSync, GTK_CHECK_VERSION, use_xim, SET_SCROLL_BAR_X_WIDGET)
(struct x_bitmap_record):
Use bool for booleans.
* src/ccl.c (struct buffer_text):
* src/ccl.h (struct ccl_program):
* src/charset.h (struct charset):
* src/cm.h (struct cm):
* src/coding.h (struct iso_2022_spec, struct coding_system):
* src/dispextern.h (struct glyph, struct glyph_matrix, struct glyph_row)
(struct glyph_string, struct face, struct face_cache)
(struct bidi_string_data, struct bidi_it)
(struct draw_fringe_bitmap_params, struct it, Mouse_HLInfo)
(struct image):
* src/editfns.c (Fformat):
* src/frame.h (struct frame):
* src/fringe.c (struct fringe_bitmap):
* src/intervals.h (struct interval):
* src/keyboard.h (struct kboard):
* src/lisp.h (struct Lisp_Symbol, struct Lisp_Misc_Any, struct Lisp_Marker)
(struct Lisp_Overlay, struct Lisp_Save_Value, struct Lisp_Free)
(struct Lisp_Buffer_Local_Value, union specbinding):
* src/macfont.m (struct macfont_info):
* src/process.h (struct Lisp_Process):
* src/termchar.h (struct tty_display_info):
* src/window.h (struct window):
* src/xterm.h (struct x_output):
Use bool_bf for boolean bit-fields.
* src/ccl.c (setup_ccl_program): Now returns bool instead of -1 or 0.
All callers changed.
* src/ccl.h (struct ccl_program): Remove unused members private_state,
src_multibyte, dst_multibyte, cr_consumed, suppress_error,
eight_bit_control.
(struct ccl_spec): Remove unused members cr_carryover,
eight_bit_carryover.
* src/conf_post.h: Include <stdbool.h>.
(bool_bf): New type.
* src/dispextern.h (TRACE, PREPARE_FACE_FOR_DISPLAY):
* src/interval.h (RESET_INTERVAL, COPY_INTERVAL_CACHE, MERGE_INTERVAL_CACHE)
Surround statement macro with proper 'do { ... } while (false)' brackets.
(SET_MATRIX_ROW_ENABLED_P): Assume 2nd arg is bool.
(PRODUCE_GLYPHS): Simplify use of boolean.
* src/fileio.c (Fcopy_file):
If I is an integer, prefer 'if (I != 0)' to 'if (I)'.
* src/lisp.h (UNGCPRO): Return void, not int.
(FOR_EACH_TAIL): Use void expression, not int expression.
* src/region-cache.c: Reindent.
* src/region-cache.h: Copy comments from region-cache.c, to fix
incorrect remarks about booleans.