Log Message:
tmux: Update to 3.3

Changes:
CHANGES FROM 3.2a TO 3.3

* Add an ACL list for users connecting to the tmux socket. Users may be
  forbidden from attaching, forced to attach read-only, or allowed to attach
  read-write. A new command, server-access, configures the list. File system
  permissions must still be configured manually.
* Emit window-layout-changed on swap-pane.
* Better error reporting when applying custom layouts.
* Handle ANSI escape sequences in run-shell output.
* Add pane_start_path to match start_command.
* Set PWD so shells have a hint about the real path.
* Do not allow pipe-pane on dead panes.
* Do not report mouse positions (incorrectly) above the maximum of 223 in
  normal mouse mode.
* Add an option (default off) to control the passthrough escape sequence.
* Support more mouse buttons when the terminal sends them.
* Add a window-resized hook which is fired when the window is actually resized
  which may be later than the client resize.
* Add next_session_id format with the next session ID.
* Add formats for client and server UID and user.
* Add argument to refresh-client -l to forward clipboard to a pane.
* Add remain-on-exit-format to set text shown when pane is dead.
* With split-window -f use percentages of window size not pane size.
* Add an option (fill-character) to set the character used for unused areas of
  a client.
* Add an option (scroll-on-clear) to control if tmux scrolls into history on
  clear.
* Add a capability for OSC 7 and use it similarly to how the title is set (and
  controlled by the same set-titles option).
* Add support for systemd socket activation (where systemd creates the Unix
  domain socket for tmux rather than tmux creating it). Build with
  --enable-systemd.
* Add an option (pane-border-indicators) to select how the active pane is shown
  on the pane border (colour, arrows or both).
* Support underscore styles with capture-pane -e.
* Make pane-border-format a pane option rather than window.
* Respond to OSC 4 queries
* Fix g/G keys in modes to do the same thing as copy mode (and vi).
* Bump the time terminals have to respond to device attributes queries to three
  seconds.
* If automatic-rename is off, allow the rename escape sequence to set an empty
  name.
* Trim menu item text more intelligently.
* Add cursor-style and cursor-colour options to set the default cursor style
  and colour.
* Accept some useful and non-conflicting emacs keys in vi normal mode at the
  command prompt.
* Add a format modifier (c) to force a colour to RGB.
* Add -s and -S to display-popup to set styles, -b to set lines and -T to set
  popup title. New popup-border-lines, popup-border-style and popup-style
  options set the defaults.
* Add -e flag to set an environment variable for a popup.
* Make send-keys without arguments send the key it is bound to (if bound to a
  key).
* Try to leave terminal cursor at the right position even when tmux is drawing
  its own cursor or selection (such as at the command prompt and in choose
  mode) for people using screen readers and similar which can make use of it.
* Change so that {} is converted to tmux commands immediately when parsed. This
  means it must contain valid tmux commands. For commands which expand %% and
  %%%, this now only happens within string arguments. Use of nested aliases
  inside {} is now forbidden. Processing of commands given in quotes remains
  the same.
* Disable evports on SunOS since they are broken.
* Do not expand the file given with tmux -f so it can contain :s.
* Bump FORMAT_LOOP_LIMIT and add a log message when hit.
* Add a terminal feature for the mouse (since FreeBSD termcap does not have kmous).
* Forbid empty session names.
* Improve error reporting when the tmux /tmp directory cannot be created or
  used.
* Give #() commands a one second grace period where the output is empty before
  telling the user they aren't doing anything ("not ready").
* When building, pick default-terminal from the first of tmux-256color, tmux,
  screen-256color, screen that is available on the build system (--with-TERM
  can override).
* Do not close popups on resize, instead adjust them to fit.
* Add a client-active hook.
* Make window-linked and window-unlinked window options.
* Do not configure on macOS without the user making a choice about utf8proc
  (either --enable-utf8proc or --disable-utf8proc).
* Do not freeze output in panes when a popup is open, let them continue to
  redraw.
* Add pipe variants of the line copy commands.
* Change copy-line and copy-end-of-line not to cancel and add -and-cancel
  variants, like the other copy commands.
* Support the OSC palette-setting sequences in popups.
* Add a pane-colours array option to specify the defaults palette.
* Add support for Unicode zero-width joiner.
* Make newline a style delimiter as well so they can cross multiple lines for
  readability in configuration files.
* Change focus to be driven by events rather than scanning panes so the
  ordering of in and out is consistent.
* Add display-popup -B to open a popup without a border.
* Add a menu for popups that can be opened with button three outside the popup
  or on the left or top border. Resizing now only works on the right and bottom
  borders or when using Meta. The menu allows a popup to be closed, expanded to
  the full size of the client, centered in the client or changed into a pane.
* Make command-prompt and confirm-before block by default (like run-shell). A
  new -b flags runs them in the background as before. Also set return code for
  confirm-before.
* Change cursor style handling so tmux understands which sequences contain
  blinking and sets the flag appropriately, means that it works whether cnorm
  disables blinking or not. This now matches xterm's behaviour.
* More accurate vi(1) word navigation in copy mode and on the status line. This
  changes the meaning of the word-separators option: setting it to the empty
  string is equivalent to the previous behavior.
* Add -F for command-prompt and use it to fix "Rename" on the window menu.
* Add different command histories for different types of prompts \ 
("command",
  "search" etc).