This is intended to parallel the 'mode-line-active/inactive'
and 'header-line-active/inactive' distinction.

* doc/emacs/display.texi (Standard Faces): Document the new faces.

* lisp/faces.el (tab-line-active, tab-line-inactive): Add new faces.

* lisp/tab-line.el (tab-line-faces): Add new faces
to MEMBERS arg of 'defgroup'.
(tab-line-auto-hscroll): Use one of the faces
depending on 'mode-line-window-selected-p'.

* src/dispextern.h (CURRENT_TAB_LINE_ACTIVE_FACE_ID_3)
(CURRENT_TAB_LINE_ACTIVE_FACE_ID): New macros
based on header-line equivalents.
(CURRENT_TAB_LINE_HEIGHT): Use CURRENT_TAB_LINE_ACTIVE_FACE_ID.
(face_id): Use TAB_LINE_ACTIVE_FACE_ID and
TAB_LINE_INACTIVE_FACE_ID instead of TAB_LINE_FACE_ID.

* src/xdisp.c (window_box_height, pos_visible_p, init_iterator)
(window_text_pixel_size, display_mode_lines, display_mode_line)
(format-mode-line): Replace all uses of TAB_LINE_FACE_ID with
either a new macro or the new face IDs.

* src/xfaces.c (lookup_basic_face, realize_basic_faces):
Map new face IDs to their lisp symbols.
(syms_of_xfaces): New lisp symbols.

* src/conf_post.h [WINDOWSNT]: Use "#if !FOO" because HAVE_DECL_*
are defined to zero.

* src/conf_post.h [WINDOWSNT]: Add prototype for 'getline'.

* src/conf_post.h [WINDOWSNT]: Add prototype for 'getdelim'.
Reported by Angelo Graziosi <angelo.g0@libero.it>.

Many regexps do not pay attention to syntax tables at all
because they don't use things like \s, \b, \<, or \_<.
So delay the actual initialization of the machinery for
`syntax-table` properties (especially the call to `syntax-propertize`)
until the first time we actually need to consult the syntax of
a character.

* src/syntax.c (uninitialized_interval): New constant.
(RE_SETUP_SYNTAX_TABLE_FOR_OBJECT, SETUP_SYNTAX_TABLE):
Set `forw/backward_i` to that new constant to indicate they haven't
actually be initialized yet.
Set `start` and `stop` fields right away, instead of delegating it to
`update_syntax_table`, so that `e_property` and `b_property`
can be set independently.
(update_syntax_table): Remove the `init` argument.  Instead, discover
the need for initialization based on the fact that `forw/backward_i`
are uninitialized.  Presume `start` and `stop` fields have been
set already.
(parse_sexp_propertize): Update call accordingly.
(update_syntax_table_forward): Remove the `init` argument.

* src/syntax.h (update_syntax_table, update_syntax_table_forward):
Remove the `init` argument.
(UPDATE_SYNTAX_TABLE_FORWARD, UPDATE_SYNTAX_TABLE_BACKWARD):
Update calls accordingly.

* src/w32.c (sys_close): Don't close a descriptor from which the
reader thread is reading, to avoid hanging Emacs.  (Bug#80770)

By disabling hw-acceleration we can re-enable xwidgets with newer
webkit2gtk versions (Bug#80728).
Newer versions were disallowed (Bug#66068) since they abort when a
webkit view is created; however, they work fine as long as we disable
hw-acceleration, since the off-screen windows that xwidgets uses do not
support that.
* configure.ac: Remove upper-bound for webkit2gtk version check.
* src/xwidget.c (Fmake_xwidget): Turn off hardware-acceleration.

Copyright-paperwork-exempt: yes

* src/w32console.c (w32con_set_cursor_size): New function.
(w32con_reset_terminal_modes, w32con_set_terminal_modes)
(Fset_cursor_size): Use it to change cursor shape on Windows
Terminal.