* src/dispnew.c (update_frame_1): Don'f flush if tty's
output_buffer_size is non-zero.
* src/sysdep.c (init_sys_modes): Setvbuf depending on the tty's
output_buffer_size.
* src/term.c (Ftty__set_output_buffer_size, Ftty__output_buffer_size):
Low-level interface for setting and retrieving a tty's output buffer
size.
(syms_of_term): Defsubr the new functions.
* src/termchar.h (struct tty_display_info): New member
output_buffer_size.
* stc/NEWS: Describe the change.

Instead of emitting menu-item keys like [tab-1],
emit normal mouse events like [mouse-1] and [down-mouse-3]
for all mouse clicks issued on the tab-bar.

* lisp/mouse.el (mouse-posn-property): Handle 'tab-bar' posn-area.

* lisp/tab-bar.el (tab--key-to-number): New internal function.
(tab-bar-handle-mouse): Use tab key to select/close tab.
(tab-bar-mouse-select-tab, tab-bar-mouse-close-tab)
(tab-bar-mouse-context-menu): New commands.
(tab-bar-map): Bind [down-mouse-1] to tab-bar-mouse-select-tab,
[down-mouse-2] to tab-bar-mouse-close-tab,
[down-mouse-3] to tab-bar-mouse-context-menu.
(tab-bar-keymap-cache): Remove.
(tab-bar-make-keymap): Don't use cache.
(tab-bar--format-tab): Remove default bindings from menu items.
(tab-bar-make-keymap-1): Prepend tab-bar-map.

* src/keyboard.c (make_lispy_event): Append event->arg to position
for Qtab_bar.

* src/term.c (handle_one_term_event): Simplify to set event arg.

* src/w32inevt.c (do_mouse_event): Set emacs_ev->arg to the value
returned from tty_handle_tab_bar_click.

* src/w32term.c (w32_handle_tab_bar_click): Return value from
handle_tab_bar_click.
(w32_read_socket): Set tab_bar_key to value returned from
w32_handle_tab_bar_click, and set event arg from it.

* src/xdisp.c (handle_tab_bar_click): Instead of emitting event,
return a list with Qtab_bar and tab caption with text properties
that contain Qmenu_item with key and binding.
(tty_handle_tab_bar_click): Simplify to return a list of Qtab_bar,
key and close_p, instead of emitting event.

* src/xterm.c (handle_one_xevent): Set tab_bar_key to value
returned from handle_tab_bar_click, and set event arg from it.

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

* src/termchar.h (struct tty_display_info):
* src/term.c (turn_on_face, tty_capable_p): Reformat new code.

* term.c: Support strike-through in capable terminals.
(no_color_bit): Replace unused NC_INVIS with
NC_STRIKE_THROUGH.
(turn_on_face): Output via TS_enter_strike_through_mode
if available.
(turn_off_face): Handle strike-through case.
(tty_capable_p, init_tty): Support strike-through.
* termchar.h (struct tty_display_info): Add field for
strike-through.
* xfaces.c (tty_supports_face_attributes_p, realize_tty_face):
Handle strike-through case.
* dispextern.h: Add TTY_CAP_STRIKE_THROUGH definition.
(struct face): Add field tty_strike_through_p.

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

This for now doesn't work on GPM.
* src/xdisp.c (display_tab_bar): Make the loop over tab-bar
items more efficient.
(tab_bar_item_info, tool_bar_item_info): Correct data type for
CHARPOS.
(tty_get_tab_bar_item, tty_handle_tab_bar_click): New functions.
(note_mouse_highlight): Handle help-echo of tab-bar tabs on
TTY frames.
* src/w32inevt.c (do_mouse_event): Call
tty_handle_tab_bar_click to process mouse clicks on the tab bar.
* src/termchar.h (tty_handle_tab_bar_click): Add prototype.
* src/w32console.c (w32con_set_terminal_modes): Disable Quick
Edit mode on entry, to make sure mouse events get reported to
us.

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