Adding upstream version 3.3a.upstream/3.3aupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3415 insertions, 0 deletions

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+CHANGES FROM 3.3 TO 3.3a
+
+* Do not crash when run-shell produces output from a config file.
+
+* Do not unintentionally turn off all mouse mode when button mode is also
+  present.
+
+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).
+
+CHANGES FROM 3.2 TO 3.2a
+
+* Add an "always" value for the "extended-keys" option; if set then tmux will
+  forward extended keys to applications even if they do not request them.
+
+* Add a "mouse" terminal feature so tmux can enable the mouse on terminals
+  where it is known to be supported even if terminfo(5) says otherwise.
+
+* Do not expand the filename given to -f so it can contain colons.
+
+* Fixes for problems with extended keys and modifiers, scroll region,
+  source-file, crosscompiling, format modifiers and other minor issues.
+
+CHANGES FROM 3.1c TO 3.2
+
+* Add a flag to disable keys to close a message.
+
+* Permit shortcut keys in buffer, client, tree modes to be configured with a
+  format (-K flag to choose-buffer, choose-client, choose-tree).
+
+* Add a current_file format for the config file being parsed.
+
+* When display-message used in config file, show the message after the config
+  file finishes.
+
+* Add client-detached notification in control mode.
+
+* Improve performance of format evaluation.
+
+* Make jump command support UTF-8 in copy mode.
+
+* Support X11 colour names and other colour formats for OSC 10 and 11.
+
+* Add "pipe" variants of "copy-pipe" commands which do not copy.
+
+* Include "focused" in client flags.
+
+* Send Unicode directional isolate characters around horizontal pane borders if
+  the terminal supports UTF-8 and an extension terminfo(5) capability "Bidi" is
+  present.
+
+* Add a -S flag to new-window to make it select the existing window if one
+  with the given name already exists rather than failing with an error.
+
+* Add a format modifier to check if a window or session name exists (N/w or
+  N/s).
+
+* Add compat clock_gettime for older macOS.
+
+* Add a no-detached choice to detach-on-destroy which detaches only if there
+  are no other detached sessions to switch to.
+
+* Add rectangle-on and rectangle-off copy mode commands.
+
+* Change so that window_flags escapes # automatically. A new format
+  window_raw_flags contains the old unescaped version.
+
+* Add -N flag to never start server even if command would normally do so.
+
+* With incremental search, start empty and only repeat the previous search if
+  the user tries to search again with an empty prompt.
+
+* Add a value for remain-on-exit that only keeps the pane if the program
+  failed.
+
+* Add a -C flag to run-shell to use a tmux command rather than a shell command.
+
+* Do not list user options with show-hooks.
+
+* Remove current match indicator in copy mode which can't work anymore since we
+  only search the visible region.
+
+* Make synchronize-panes a pane option and add -U flag to set-option to unset
+  an option on all panes.
+
+* Make replacement of ##s consistent when drawing formats, whether followed by
+  [ or not. Add a flag (e) to the q: format modifier to double up #s.
+
+* Add -N flag to display-panes to ignore keys.
+
+* Change how escaping is processed for formats so that ## and # can be used in
+  styles.
+
+* Add a 'w' format modifier for string width.
+
+* Add support for Haiku.
+
+* Expand menu and popup -x and -y as formats.
+
+* Add numeric comparisons for formats.
+
+* Fire focus events even when the pane is in a mode.
+
+* Add -O flag to display-menu to not automatically close when all mouse buttons
+  are released.
+
+* Allow fnmatch(3) wildcards in update-environment.
+
+* Disable nested job expansion so that the result of #() is not expanded again.
+
+* Use the setal capability as well as (tmux's) Setulc.
+
+* Add -q flag to unbind-key to hide errors.
+
+* Allow -N without a command to change or add a note to an existing key.
+
+* Add a -w flag to set- and load-buffer to send to clipboard using OSC 52.
+
+* Add -F to set-environment and source-file.
+
+* Allow colour to be spelt as color in various places.
+
+* Add n: modifier to get length of a format.
+
+* Respond to OSC colour requests if a colour is available.
+
+* Add a -d option to display-message to set delay.
+
+* Add a way for control mode clients to subscribe to a format and be notified
+  of changes rather than having to poll.
+
+* Add some formats for search in copy mode (search_present, search_match).
+
+* Do not wait on shutdown for commands started with run -b.
+
+* Add -b flags to insert a window before (like the existing -a for after) to
+  break-pane, move-window, new-window.
+
+* Make paste -p the default for ].
+
+* Add support for pausing a pane when the output buffered for a control mode
+  client gets too far behind. The pause-after flag with a time is set on the
+  pane with refresh-client -f and a paused pane may be resumed with
+  refresh-client -A.
+
+* Allow strings in configuration files to span multiple lines - newlines and
+  any leading whitespace are removed, as well as any following comments that
+  couldn't be part of a format. This allows long formats or other strings to be
+  annotated and indented.
+
+* Instead of using a custom parse function to process {} in configuration
+  files, treat as a set of statements the same as outside {} and convert back
+  to a string as the last step. This means the rules are consistent inside and
+  outside {}, %if and friends work at the right time, and the final result
+  isn't littered with unnecessary newlines.
+
+* Add support for extended keys - both xterm(1)'s CSI 27 ~ sequence and the
+  libtickit CSI u sequence are accepted; only the latter is output. tmux will
+  only attempt to use these if the extended-keys option is on and it can detect
+  that the terminal outside supports them (or is told it does with the
+  "extkeys" terminal feature).
+
+* Add an option to set the pane border lines style from a choice of single
+  lines (ACS or UTF-8), double or heavy (UTF-8), simple (plain ASCII) or number
+  (the pane numbers). Lines that won't work on a non-UTF-8 terminal are
+  translated back into ACS when they are output.
+
+* Make focus events update the latest client (like a key press).
+
+* Store UTF-8 characters differently to reduce memory use.
+
+* Fix break-pane -n when only one pane in the window.
+
+* Instead of sending all data to control mode clients as fast as possible, add
+  a limit of how much data will be sent to the client and try to use it for
+  panes with some degree of fairness.
+
+* Add an active-pane client flag (set with attach-session -f, new-session -f
+  or refresh-client -f). This allows a client to have an independent active
+  pane for interactive use (the window client pane is still used for many
+  things however).
+
+* Add a mark to copy mode, this is set with the set-mark command (bound to X)
+  and appears with the entire line shown using copy-mode-mark-style and the
+  marked character in reverse. The jump-to-mark command (bound to M-x) swaps
+  the mark and the cursor positions.
+
+* Add a -D flag to make the tmux server run in the foreground and not as a
+  daemon.
+
+* Do not loop forever in copy mode when search finds an empty match.
+
+* Fix the next-matching-bracket logic when using vi(1) keys.
+
+* Add a customize mode where options may be browsed and changed, includes
+  adding a brief description of each option. Bound to C-b C by default.
+
+* Change message log (C-b ~) so there is one for the server rather than one per
+  client and it remains after detach, and make it useful by logging every
+  command.
+
+* Add M-+ and M-- to tree mode to expand and collapse all.
+
+* Change the existing client flags for control mode to apply for any client,
+  use the same mechanism for the read-only flag and add an ignore-size flag.
+
+  refresh-client -F has become -f (-F stays for backwards compatibility) and
+  attach-session and switch-client now have -f flags also. A new format
+  client_flags lists the flags and is shown by list-clients by default.
+
+  This separates the read-only flag from "ignore size" behaviour (new
+  ignore-size) flag - both behaviours are useful in different circumstances.
+
+  attach -r and switchc -r remain and set or toggle both flags together.
+
+* Store and restore cursor position when copy mode is resized.
+
+* Export TERM_PROGRAM and TERM_PROGRAM_VERSION like various other terminals.
+
+* Add formats for after hook command arguments: hook_arguments with all the
+  arguments together; hook_argument_0, hook_argument_1 and so on with
+  individual arguments; hook_flag_X if flag -X is present; hook_flag_X_0,
+  hook_flag_X_1 and so on if -X appears multiple times.
+
+* Try to search the entire history first for up to 200 ms so a search count can
+  be shown. If it takes too long, search the visible text only.
+
+* Use VIS_CSTYLE for paste buffers also (show \012 as \n).
+
+* Change default formats for tree mode, client mode and buffer mode to be more
+  compact and remove some clutter.
+
+* Add a key (e) in buffer mode to open the buffer in an editor. The buffer
+  contents is updated when the editor exits.
+
+* Add -e flag for new-session to set environment variables, like the same flag
+  for new-window.
+
+* Improve search match marking in copy mode. Two new options
+  copy-mode-match-style and copy-mode-current-match-style to set the style for
+  matches and for the current match respectively. Also a change so that if a
+  copy key is pressed with no selection, the current match (if any) is copied.
+
+* Sanitize session names like window names instead of forbidding invalid ones.
+
+* Check if the clear terminfo(5) capability starts with CSI and if so then
+  assume the terminal is VT100-like, rather than relying on the XT capability.
+
+* Improve command prompt tab completion and add menus both for strings and -t
+  and -s (when used without a trailing space). command-prompt has additional
+  flags for only completing a window (-W) and a target (-T), allowing C-b ' to
+  only show windows and C-b . only targets.
+
+* Change all the style options to string options so they can support formats.
+  Change pane-active-border-style to use this to change the border colour when
+  in a mode or with synchronize-panes on. This also implies a few minor changes
+  to existing behaviour:
+
+  - set-option -a with a style option automatically inserts a comma between the
+    old value and appended text.
+
+  - OSC 10 and 11 no longer set the window-style option, instead they store the
+    colour internally in the pane data and it is used as the default when the
+    option is evaluated.
+
+  - status-fg and -bg now override status-style instead of the option values
+    being changed.
+
+* Add extension terminfo(5) capabilities for margins and focus reporting.
+
+* Try $XDG_CONFIG_HOME/tmux/tmux.conf as well as ~/.config/tmux/tmux.conf for
+  configuration file (the search paths are in TMUX_CONF in Makefile.am).
+
+* Remove the DSR 1337 iTerm2 extension and replace by the extended device
+  attributes sequence (CSI > q) supported by more terminals.
+
+* Add a -s flag to copy-mode to specify a different pane for the source
+  content. This means it is possible to view two places in a pane's history at
+  the same time in different panes, or view the history while still using the
+  pane. Pressing r refreshes the content from the source pane.
+
+* Add an argument to list-commands to show only a single command.
+
+* Change copy mode to make copy of the pane history so it does not need to
+  freeze the pane.
+
+* Restore pane_current_path format from portable tmux on OpenBSD.
+
+* Wait until the initial command sequence is done before sending a device
+  attributes request and other bits that prompt a reply from the terminal. This
+  means that stray replies are not left on the terminal if the command has
+  attached and then immediately detached and tmux will not be around to receive
+  them.
+
+* Add a -f filter argument to the list commands like choose-tree.
+
+* Move specific hooks for panes to pane options and windows for window options
+  rather than all hooks being session options. These hooks are now window options:
+
+  window-layout-changed
+  window-linked
+  window-pane-changed
+  window-renamed
+  window-unlinked
+
+  And these are now pane options:
+
+  pane-died
+  pane-exited
+  pane-focus-in
+  pane-focus-out
+  pane-mode-changed
+  pane-set-clipboard
+
+  Any existing configurations using these hooks on a session rather than
+  globally (that is, set-hook or set-option without -g) may need to be changed.
+
+* Show signal names when a process exits with remain-on-exit on platforms which
+  have a way to get them.
+
+* Start menu with top item selected if no mouse and use mode-style for the
+  selected item.
+
+* Add a copy-command option and change copy-pipe and friends to pipe to it if
+  used without arguments, allows all the default copy key bindings to be
+  changed to pipe with one option rather than needing to change each key
+  binding individually.
+
+* Tidy up the terminal detection and feature code and add named sets of
+  terminal features, each of which are defined in one place and map to a
+  builtin set of terminfo(5) capabilities. Features can be specified based on
+  TERM with a new terminal-features option or with the -T flag when running
+  tmux. tmux will also detect a few common terminals from the DA and DSR
+  responses.
+
+  This is intended to make it easier to configure tmux's use of terminfo(5)
+  even in the presence of outdated ncurses(3) or terminfo(5) databases or for
+  features which do not yet have a terminfo(5) entry. Instead of having to grok
+  terminfo(5) capability names and what they should be set to in the
+  terminal-overrides option, the user can hopefully just give tmux a feature
+  name and let it do the right thing.
+
+  The terminal-overrides option remains both for backwards compatibility and to
+  allow tweaks of individual capabilities.
+
+* Support mintty's application escape sequence (means tmux doesn't have to
+  delay to wait for Escape, so no need to reduce escape-time when using
+  mintty).
+
+* Change so main-pane-width and height can be given as a percentage.
+
+* Support for the iTerm2 synchronized updates feature (allows the terminal to
+  avoid unnecessary drawing while output is still in progress).
+
+* Make the mouse_word and mouse_line formats work in copy mode and enable the
+  default pane menu in copy mode.
+
+* Add a -T flag to resize-pane to trim lines below the cursor, moving lines out
+  of the history.
+
+* Add a way to mark environment variables as "hidden" so they can be used by
+  tmux (for example in formats) but are not set in the environment for new
+  panes. set-environment and show-environment have a new -h flag and there is a
+  new %hidden statement for the configuration file.
+
+* Change default position for display-menu -x and -y to centre rather than top
+  left.
+
+* Add support for per-client transient popups, similar to menus but which are
+  connected to an external command (like a pane). These are created with new
+  command display-popup.
+
+* Change double and triple click bindings so that only one is fired (previously
+  double click was fired on the way to triple click). Also add default double
+  and triple click bindings to copy the word or line under the cursor and
+  change the existing bindings in copy mode to do the same.
+
+* Add a default binding for button 2 to paste.
+
+* Add -d flag to run-shell to delay before running the command and allow it to
+  be used without a command so it just delays.
+
+* Add C-g to cancel command prompt with vi keys as well as emacs, and q in
+  command mode.
+
+* When the server socket is given with -S, create it with umask 177 instead of
+  117 (because it may not be in a safe directory like the default directory in
+  /tmp).
+
+* Add a copy-mode -H flag to hide the position marker in the top right.
+
+* Add number operators for formats (+, -, *, / and m),
+
+CHANGED FROM 3.1b TO 3.1c
+
+* Do not write after the end of the array and overwrite the stack when
+  colon-separated SGR sequences contain empty arguments.
+
+CHANGES FROM 3.1a TO 3.1b
+
+* Fix build on systems without sys/queue.h.
+
+* Fix crash when allow-rename is on and an empty name is set.
+
+CHANGES FROM 3.1 TO 3.1a
+
+* Do not close stdout prematurely in control mode since it is needed to print
+  exit messages. Prevents hanging when detaching with iTerm2.
+
+CHANGES FROM 3.0a TO 3.1
+
+* Only search the visible part of the history when marking (highlighting)
+  search terms. This is much faster than searching the whole history and solves
+  problems with large histories. The count of matches shown is now the visible
+  matches rather than all matches.
+
+* Search using regular expressions in copy mode. search-forward and
+  search-backward use regular expressions by default; the incremental versions
+  do not.
+
+* Turn off mouse mode 1003 as well as the rest when exiting.
+
+* Add selection_active format for when the selection is present but not moving
+  with the cursor.
+
+* Fix dragging with modifier keys, so binding keys such as C-MouseDrag1Pane and
+  C-MouseDragEnd1Pane now work.
+
+* Add -a to list-keys to also list keys without notes with -N.
+
+* Do not jump to next word end if already on a word end when selecting a word;
+  fixes select-word with single character words and vi(1) keys.
+
+* Fix top and bottom pane calculation with pane border status enabled.
+
+* Add support for adding a note to a key binding (with bind-key -N) and use
+  this to add descriptions to the default key bindings. A new -N flag to
+  list-keys shows key bindings with notes. Change the default ? binding to use
+  this to show a readable summary of keys. Also extend command-prompt to return
+  the name of the key pressed and add a default binding (/) to show the note
+  for the next key pressed.
+
+* Add support for the iTerm2 DSR 1337 sequence to get the terminal version.
+
+* Treat plausible but invalid keys (like C-BSpace) as literal like any other
+  unrecognised string passed to send-keys.
+
+* Detect iTerm2 and enable use of DECSLRM (much faster with horizontally split
+  windows).
+
+* Add -Z to default switch-client command in tree mode.
+
+* Add ~ to quoted characters for %%%.
+
+* Document client exit messages in the manual page.
+
+* Do not let read-only clients limit the size, unless all clients are
+  read-only.
+
+* Add a number of new formats to inspect what sessions and clients a window is
+  present or active in.
+
+* Change file reading and writing to go through the client if necessary. This
+  fixes commands like "tmux loadb /dev/fd/X". Also modify source-file to
+  support "-" for standard input, like load-buffer and save-buffer.
+
+* Add ~/.config/tmux/tmux.conf to the default search path for configuration
+  files.
+
+* Bump the escape sequence timeout to five seconds to allow for longer
+  legitimate sequences.
+
+* Make a best effort to set xpixel and ypixel for each pane and add formats for
+  them.
+
+* Add push-default to status-left and status-right in status-format[0].
+
+* Do not clear search marks on cursor movement with vi(1) keys.
+
+* Add p format modifier for padding to width and allow multiple substitutions
+  in a single format.
+
+* Add -f for full size to join-pane (like split-window).
+
+* Do not use bright when emulating 256 colours on an 8 colour terminal because
+  it is also bold on some terminals.
+
+* Make select-pane -P set window-active-style also to match previous behaviour.
+
+* Do not truncate list-keys output.
+
+* Turn automatic-rename back on if the \033k rename escape sequence is used
+  with an empty name.
+
+* Add support for percentage sizes for resize-pane ("-x 10%"). Also change
+  split-window and join-pane -l to accept similar percentages and deprecate the
+  -p flag.
+
+* Add -F flag to send-keys to expand formats in search-backward and forward
+  copy mode commands and copy_cursor_word and copy_cursor_line formats for word
+  and line at cursor in copy mode. Use for default # and * binding with vi(1)
+  keys.
+
+* Add formats for word and line at cursor position in copy mode.
+
+* Add formats for cursor and selection position in copy mode.
+
+* Support all the forms of RGB colour strings in OSC sequences rather than
+  requiring two digits.
+
+* Limit lazy resize to panes in attached sessions only.
+
+* Add an option to set the key sent by backspace for those whose system uses ^H
+  rather than ^?.
+
+* Change new-session -A without a session name (that is, no -s option also) to
+  attach to the best existing session like attach-session rather than a new
+  one.
+
+* Add a "latest" window-size option which tries to size windows based on the
+  most recently used client. This is now the default.
+
+* Add simple support for OSC 7 (result is available in the pane_path format).
+
+* Add push-default and pop-default for styles which change the colours and
+  attributes used for #[default]. These are used in status-format to restore
+  the behaviour of window-status-style being the default for
+  window-status-format.
+
+* Add window_marked_flag.
+
+* Add cursor-down-and-cancel in copy mode.
+
+* Default to previous search string for search-forward and search-backward.
+
+* Add -Z flag to rotate-window, select-pane, swap-pane, switch-client to
+  preserve zoomed state.
+
+* Add -N to capture-pane to preserve trailing spaces.
+
+* Add reverse sorting in tree, client and buffer modes.
+
+CHANGES FROM 3.0 TO 3.0a
+
+* Do not require REG_STARTEND.
+
+* Respawn panes or windows correctly if default-command is set.
+
+* Add missing option for after-kill-pane hook.
+
+* Fix for crash with a format variable that doesn't exist.
+
+* Do not truncate list-keys output on some platforms.
+
+* Do not crash when restoring a layout with only one pane.
+
+CHANGES FROM 2.9 TO 3.0
+
+* Workaround invalid layout strings generated by older tmux versions and add
+  some additional sanity checks
+
+* xterm 348 now disables margins when resized, so send DECLRMM again after
+  resize.
+
+* Add support for the SD (scroll down) escape sequence.
+
+* Expand arguments to C and s format modifiers to match the m modifier.
+
+* Add support for underscore colours (Setulc capability must be added with
+  terminal-overrides as described in tmux(1)).
+
+* Add a "fill" style attribute for the fill colour of the drawing area (where
+  appropriate).
+
+* New -H flag to send-keys to send literal keys.
+
+* Format variables for pane mouse modes (mouse_utf8_flag and mouse_sgr_flag)
+  and for origin mode (origin_flag).
+
+* Add -F to refresh-client for flags for control mode clients, only one flag
+  (no-output) supported at the moment.
+
+* Add a few vi(1) keys for menus.
+
+* Add pane options, set with set-option -p and displayed with show-options -p.
+  Pane options inherit from window options (so every pane option is also
+  a window option). The pane style is now configured by setting window-style
+  and window-active-style in the pane options; select-pane -P and -g now change
+  the option but are no longer documented.
+
+* Do not document set-window-option and show-window-options. set-option -w and
+  show-options -w should be used instead.
+
+* Add a -A flag to show-options to show parent options as well (they are marked
+  with a *).
+
+* Resize panes lazily - do not resize unless they are in an attached, active
+  window.
+
+* Add regular expression support for the format search, match and substitute
+  modifiers and make them able to ignore case. find-window now accepts -r to
+  use regular expressions.
+
+* Do not use $TMUX to find the session because for windows in multiple sessions
+  it is wrong as often as it is right, and for windows in one session it is
+  pointless. Instead use TMUX_PANE if it is present.
+
+* Do not always resize the window back to its original size after applying a
+  layout, keep it at the layout size until it must be resized (for example when
+  attached and window-size is not manual).
+
+* Add new-session -X and attach-session -x to send SIGHUP to parent when
+  detaching (like detach-client -P).
+
+* Support for octal escapes in strings (such as \007) and improve list-keys
+  output so it parses correctly if copied into a configuration file.
+
+* INCOMPATIBLE: Add a new {} syntax to the configuration file. This is a string
+  similar to single quotes but also includes newlines and allows commands that
+  take other commands as string arguments to be expressed more clearly and
+  without additional escaping.
+
+  A literal { and } or a string containing { or } must now be escaped or
+  quoted, for example '{' and '}' instead of { or }, or 'X#{foo}' instead of
+  X#{foo}.
+
+* New <, >, <= and >= comparison operators for formats.
+
+* Improve escaping of special characters in list-keys output.
+
+* INCOMPATIBLE: tmux's configuration parsing has changed to use yacc(1). There
+  is one incompatible change: a \ on its own must be escaped or quoted as
+  either \\ or '\' (the latter works on older tmux versions).
+
+  Entirely the same parser is now used for parsing the configuration file
+  and for string commands. This means that constructs previously only
+  available in .tmux.conf, such as %if, can now be used in string commands
+  (for example, those given to if-shell - not commands invoked from the
+  shell, they are still parsed by the shell itself).
+
+* Add support for the overline attribute (SGR 53). The Smol capability is
+  needed in terminal-overrides.
+
+* Add the ability to create simple menus. Introduces new command
+  display-menu. Default menus are bound to MouseDown3 on the status line;
+  MouseDown3 or M-MouseDown3 on panes; MouseDown3 in tree, client and
+  buffer modes; and C-b < and >.
+
+* Allow panes to be empty (no command). They can be created either by piping to
+  split-window -I, or by passing an empty command ('') to split-window. Output
+  can be sent to an existing empty window with display-message -I.
+
+* Add keys to jump between matching brackets (emacs C-M-f and C-M-b, vi %).
+
+* Add a -e flag to new-window, split-window, respawn-window, respawn-pane to
+  pass environment variables into the newly created process.
+
+* Hooks are now stored in the options tree as array options, allowing them to
+  have multiple separate commands. set-hook and show-hooks remain but
+  set-option and show-options can now also be used (show-options will only show
+  hooks if given the -H flag). Hooks with multiple commands are run in index
+  order.
+
+* Automatically scroll if dragging to create a selection with the mouse and the
+  cursor reaches the top or bottom line.
+
+* Add -no-clear variants of copy-selection and copy-pipe which do not clear the
+  selection after copying. Make copy-pipe clear the selection by default to be
+  consistent with copy-selection.
+
+* Add an argument to copy commands to set the prefix for the buffer name, this
+  (for example) allows buffers for different sessions to be named separately.
+
+* Update session activity on focus event.
+
+* Pass target from source-file into the config file parser so formats in %if
+  and %endif have access to more useful variables.
+
+* Add the ability to infer an option type (server, session, window) from its
+  name to show-options (it was already present in set-option).
+
+CHANGES FROM 2.9 TO 2.9a
+
+* Fix bugs in select-pane and the main-horizontal and main-vertical layouts.
+
+CHANGES FROM 2.8 TO 2.9
+
+* Attempt to preserve horizontal cursor position as well as vertical with
+  reflow.
+
+* Rewrite main-vertical and horizontal and change layouts to better handle the
+  case where all panes won't fit into the window size, reduce problems with
+  pane border status lines and fix other bugs mostly found by Thomas Sattler.
+
+* Add format variables for the default formats in the various modes
+  (tree_mode_format and so on) and add a -a flag to display-message to list
+  variables with values.
+
+* Add a -v flag to display-message to show verbose messages as the format is
+  parsed, this allows formats to be debugged
+
+* Add support for HPA (\033[`).
+
+* Add support for origin mode (\033[?6h).
+
+* No longer clear history on RIS.
+
+* Extend the #[] style syntax and use that together with previous format
+  changes to allow the status line to be entirely configured with a single
+  option.
+
+  Now that it is possible to configure their content, enable the existing code
+  that lets the status line be multiple lines in height. The status option can
+  now take a value of 2, 3, 4 or 5 (as well as the previous on or off) to
+  configure more than one line. The new status-format array option configures
+  the format of each line, the default just references the existing status-*
+  options, although some of the more obscure status options may be eliminated
+  in time.
+
+  Additions to the #[] syntax are: "align" to specify alignment (left, centre,
+  right), "list" for the window list and "range" to configure ranges of text
+  for the mouse bindings.
+
+  The "align" keyword can also be used to specify alignment of entries in tree
+  mode and the pane status lines.
+
+* Add E: and T: format modifiers to expand a format twice (useful to expand the
+  value of an option).
+
+* The individual -fg, -bg and -attr options have been removed; they
+  were superseded by -style options in tmux 1.9.
+
+* Allow more than one mode to be opened in a pane. Modes are kept on a stack
+  and retrieved if the same mode is entered again. Exiting the active mode goes
+  back to the previous one.
+
+* When showing command output in copy mode, call it view mode instead (affects
+  pane_mode format).
+
+* Add -b to display-panes like run-shell.
+
+* Handle UTF-8 in word-separators option.
+
+* New "terminal" colour allowing options to use the terminal default colour
+  rather than inheriting the default from a parent option.
+
+* Do not move the cursor in copy mode when the mouse wheel is used.
+
+* Use the same working directory rules for jobs as new windows rather than
+  always starting in the user's home.
+
+* Allow panes to be one line or column in size.
+
+* Go to last line when goto-line number is out of range in copy mode.
+
+* Yank previously cut text if any with C-y in the command prompt, only use the
+  buffer if no text has been cut.
+
+* Add q: format modifier to quote shell special characters.
+
+* Add StatusLeft and StatusRight mouse locations (keys such as
+  MouseDown1StatusLeft) for the status-left and status-right areas of the
+  status line.
+
+* Add -Z to find-window.
+
+* Support for windows larger than the client. This adds two new options,
+  window-size and default-size, and a new command, resize-window. The
+  force-width and force-height options and the session_width and session_height
+  formats have been removed.
+
+  The new window-size option tells tmux how to work out the size of windows:
+  largest means it picks the size of the largest session, smallest the smallest
+  session (similar to the old behaviour) and manual means that it does not
+  automatically resize windows. aggressive-resize modifies the choice of
+  session for largest and smallest as it did before.
+
+  If a window is in a session attached to a client that is too small, only part
+  of the window is shown. tmux attempts to keep the cursor visible, so the part
+  of the window displayed is changed as the cursor moves (with a small delay,
+  to try and avoid excess redrawing when applications redraw status lines or
+  similar that are not currently visible).
+
+  Drawing windows which are larger than the client is not as efficient as those
+  which fit, particularly when the cursor moves, so it is recommended to avoid
+  using this on slow machines or networks (set window-size to smallest or
+  manual).
+
+  The resize-window command can be used to resize a window manually. If it is
+  used, the window-size option is automatically set to manual for the window
+  (undo this with "setw -u window-size"). resize-window works in a similar way
+  to resize-pane (-U -D -L -R -x -y flags) but also has -a and -A flags. -a
+  sets the window to the size of the smallest client (what it would be if
+  window-size was smallest) and -A the largest.
+
+  For the same behaviour as force-width or force-height, use resize-window -x
+  or -y.
+
+  If the global window-size option is set to manual, the default-size option is
+  used for new windows. If -x or -y is used with new-session, that sets the
+  default-size option for the new session.
+
+  The maximum size of a window is 10000x10000. But expect applications to
+  complain and higher memory use if making a window that big. The minimum size
+  is the size required for the current layout including borders.
+
+  The refresh-client command can be used to pan around a window, -U -D -L -R
+  moves up, down, left or right and -c returns to automatic cursor
+  tracking. The position is reset when the current window is changed.
+
+CHANGES FROM 2.7 TO 2.8
+
+* Make display-panes block the client until a pane is chosen or it
+  times out.
+
+* Clear history on RIS like most other terminals do.
+
+* Add an "Any" key to run a command if a key is pressed that is not
+  bound in the current key table.
+
+* Expand formats in load-buffer and save-buffer.
+
+* Add a rectangle_toggle format.
+
+* Add set-hook -R to run a hook immediately.
+
+* Add README.ja.
+
+* Add pane focus hooks.
+
+* Allow any punctuation as separator for s/x/y not only /.
+
+* Improve resizing with the mouse (fix resizing the wrong pane in some
+  layouts, and allow resizing multiple panes at the same time).
+
+* Allow , and } to be escaped in formats as #, and #}.
+
+* Add KRB5CCNAME to update-environment.
+
+* Change meaning of -c to display-message so the client is used if it
+  matches the session given to -t.
+
+* Fixes to : form of SGR.
+
+* Add x and X to choose-tree to kill sessions, windows or panes.
+
+CHANGES FROM 2.6 TO 2.7
+
+* Remove EVENT_* variables from environment on platforms where tmux uses them
+  so they do not pass on to panes.
+
+* Fixes for hooks at server exit.
+
+* Remove SGR 10 (was equivalent to SGR 0 but no other terminal seems to do
+  this).
+
+* Expand formats in window and session names.
+
+* Add -Z flag to choose-tree, choose-client, choose-buffer to automatically
+  zoom the pane when the mode is entered and unzoom when it exits, assuming the
+  pane is not already zoomed. This is now part of the default key bindings.
+
+* Add C-g to exit modes with emacs keys.
+
+* Add exit-empty option to exit server if no sessions (defaults to on).
+
+* Show if a filter is present in choose modes.
+
+* Add pipe-pane -I to to connect stdin of the child process.
+
+* Performance improvements for reflow.
+
+* Use RGB terminfo(5) capability to detect RGB colour terminals (the existing
+  Tc extension remains unchanged).
+
+* Support for ISO colon-separated SGR sequences.
+
+* Add select-layout -E to spread panes out evenly (bound to E key).
+
+* Support wide characters properly when reflowing.
+
+* Pass PWD to new panes as a hint to shells, as well as calling chdir().
+
+* Performance improvements for the various choose modes.
+
+* Only show first member of session groups in tree mode (-G flag to choose-tree
+  to show all).
+
+* Support %else in config files to match %if; from Brad Town in GitHub issue
+  1071.
+
+* Fix "kind" terminfo(5) capability to be S-Down not S-Up.
+
+* Add a box around the preview label in tree mode.
+
+* Show exit status and time in the remain-on-exit pane text; from Timo
+  Boettcher in GitHub issue 1103.
+
+* Correctly use pane-base-index in tree mode.
+
+* Change the allow-rename option default to off.
+
+* Support for xterm(1) title stack escape sequences (GitHub issue 1075 from
+  Brad Town).
+
+* Correctly remove padding cells to fix a UTF-8 display problem (GitHub issue
+  1090).
+
+CHANGES FROM 2.5 TO 2.6, 05 October 2017
+
+* Add select-pane -T to set pane title.
+
+* Fix memory leak when lines with BCE are removed from history.
+
+* Fix (again) the "prefer unattached" behaviour of attach-session.
+
+* Reorder how keys are checked to allow keys to be specified that have a
+  leading escape. GitHub issue 1048.
+
+* Support REP escape sequence (\033[b).
+
+* Run alert hooks based on options rather than always, and allow further bells
+  even if there is an existing bell.
+
+* Add -d flag to display-panes to override display-panes-time.
+
+* Add selection_present format when in copy mode (allows key bindings that do
+  something different if there is a selection).
+
+* Add pane_at_left, pane_at_right, pane_at_top and pane_at_bottom formats.
+
+* Make bell, activity and silence alerting more consistent by: removing the
+  bell-on-alert option; adding activity-action and silence-action options with
+  the same possible values as the existing bell-action; adding a "both" value
+  for the visual-bell, visual-activity and visual-silence options to trigger
+  both a bell and a message.
+
+* Add a pane_pipe format to show if pipe-pane is active.
+
+* Block signals between forking and resetting signal handlers so that the
+  libevent signal handler doesn't get called in the child and incorrectly write
+  into the signal pipe that it still shares with the parent. GitHub issue 1001.
+
+* Allow punctuation in pane_current_command.
+
+* Add -c for respawn-pane and respawn-window.
+
+* Wait for any remaining data to flush when a pane is closed while pipe-pane is
+  in use.
+
+* Fix working out current client with no target. GitHub issue 995.
+
+* Try to fallback to C.UTF-8 as well as en_US.UTF-8 when looking for a UTF-8
+  locale.
+
+* Add user-keys option for user-defined key escape sequences (mapped to User0
+  to User999 keys).
+
+* Add pane-set-clipboard hook.
+
+* FAQ file has moved out of repository to online.
+
+* Fix problem with high CPU usage when a client dies unexpectedly. GitHub issue
+  941.
+
+* Do a dance on OS X 10.10 and above to return tmux to the user namespace,
+  allowing access to the clipboard.
+
+* Do not allow escape sequences which expect a specific terminator (APC, DSC,
+  OSC) to wait for forever - use a small timeout. This reduces the chance of
+  the pane locking up completely when sent garbage (cat /dev/random or
+  similar).
+
+* Support SIGUSR2 to toggle logging on a running server, also generate the
+  "out" log file with -vv not -vvvv.
+
+* Make set-clipboard a three state option: on (tmux both sends to outside
+  terminal and accepts from applications inside); external (tmux sends outside
+  but does not accept inside); and off.
+
+* Fix OSC 4 palette setting for bright foreground colours. GitHub issue 954.
+
+* Use setrgbf and setrgbb terminfo(5) capabilities to set RGB colours, if they
+  are available. (Tc is still supported as well.)
+
+* Fix redrawing panes when they are resized several times but end up with the
+  size unchanged (for example, splitw/resizep -Z/breakp).
+
+* Major rewrite of choose mode. Now includes preview, sorting, searching and
+  tagging; commands that can be executed directly from the mode (for example,
+  to delete one or more buffers); and filtering in tree mode.
+
+* choose-window and choose-session are now aliases of choose-tree (in the
+  command-alias option).
+
+* Support OSC 10 and OSC 11 to set foreground and background colours.
+
+* Check the U8 capability to determine whether to use UTF-8 line drawing
+  characters for ACS.
+
+* Some missing notifications for layout changes.
+
+* Control mode clients now do not affect session sizes until they issue
+  refresh-client -C. new-session -x and -y works with control clients even if
+  the session is not detached.
+
+* All new sessions that are unattached (whether with -d or started with no
+  terminal) are now created with size 80 x 24. Whether the status line is on or
+  off does not affect the size of new sessions until they are attached.
+
+* Expand formats in option names and add -F flag to expand them in option values.
+
+* Remember the search string for a pane even if copy mode is exited and entered
+  again.
+
+* Some further BCE fixes (scroll up, reverse index).
+
+* Improvements to how terminals are cleared (entirely or partially).
+
+CHANGES FROM 2.4 TO 2.5, 09 May 2017
+
+* Reset updated flag when restarting #() command so that new output is properly
+  recognised. GitHub issue 922.
+
+* Fix ECH with a background colour.
+
+* Do not rely on the terminal not moving the cursor after DL or EL.
+
+* Fix send-keys and send-prefix in copy-mode (so C-b C-b works). GitHub issue
+  905.
+
+* Set the current pane for rotate-window so it works in command sequences.
+
+* Add pane_mode format.
+
+* Differentiate M-Up from Escape+Up when possible (that is, in terminals with
+  xterm(1) style function keys). GitHub issue 907.
+
+* Add session_stack and window_stack_index formats.
+
+* Some new control mode notifications and corresponding hooks:
+  pane-mode-changed, window-pane-changed, client-session-changed,
+  session-window-changed.
+
+* Format pane_search_string for last search term while in copy mode (useful
+  with command-prompt -I).
+
+* Fix a problem with high CPU usage and multiple clients with #(). GitHub issue
+  889.
+
+* Fix UTF-8 combining characters in column 0.
+
+* Fix reference counting so that panes are properly destroyed and their
+  processes killed.
+
+* Clamp SU (CSI S) parameter to work around a bug in Konsole.
+
+* Tweak line wrapping in full width panes to play more nicely with terminal
+  copy and paste.
+
+* Fix when we emit SGR 0 in capture-pane -e.
+
+* Do not change TERM until after config file parsing has finished, so that
+  commands run inside the config file can use it to make decisions (typically
+  about default-terminal).
+
+* Make the initial client wait until config file parsing has finished to avoid
+  racing with commands.
+
+* Fix core when if-shell fails.
+
+* Only use ED to clear screen if the pane is at the bottom.
+
+* Fix multibyte UTF-8 output.
+
+* Code improvements around target (-t) resolution.
+
+* Change how the default target (for commands without -t) is managed across
+  command sequences: now it is set up at the start and commands are required
+  to update it if needed. Fixes binding command sequences to mouse keys.
+
+* Make if-shell from the config file work correctly.
+
+* Change to always check the root key table if no binding is found in the
+  current table (prefix table or copy-mode table or whatever). This means that
+  root key bindings will take effect even in copy mode, if not overridden by a
+  copy mode key binding.
+
+* Fix so that the history file works again.
+
+* Run config file without a client rather than using the first client, restores
+  previous behaviour.
+
+* If a #() command doesn't exit, continue to read from it and use its last full
+  line of output.
+
+* Handle slow terminals and fast output better: when the amount of data
+  outstanding gets too large, discard output until it is drained and we are
+  able to do a full redraw. Prevents tmux sitting on a huge buffer that the
+  terminal will take forever to consume.
+
+* Do not redraw a client unless we realistically think it can accept the data -
+  defer redraws until the client has nothing else waiting to write.
+
+CHANGES FROM 2.3 TO 2.4, 20 April 2017
+
+Incompatible Changes
+====================
+
+* Key tables have undergone major changes. Mode key tables are no longer
+  separate from the main key tables. All mode key tables have been removed,
+  together with the -t flag to bind-key and unbind-key.
+
+  The emacs-edit, vi-edit, emacs-choose and vi-choose tables have been replaced
+  by fixed key bindings in the command prompt and choose modes. The mode-keys
+  and status-keys options remain.
+
+  The emacs-copy and vi-copy tables have been replaced by the copy-mode and
+  copy-mode-vi tables. Commands are sent using the -X and -N flags to
+  send-keys. So the following:
+
+    bind -temacs-copy C-Up scroll-up
+    bind -temacs-copy -R5 WheelUpPane scroll-up
+
+  Becomes:
+
+    bind -Tcopy-mode C-Up send -X scroll-up
+    bind -Tcopy-mode WheelUpPane send -N5 -X scroll-up
+
+  These changes allows the full command parser (including command sequences) and
+  command set to be used - for example, the normal command prompt with editing
+  and history is now used for searching, jumping, and so on instead of a custom
+  one. The default C-r binding is now:
+
+    bind -Tcopy-mode C-r command-prompt -i -p'search up' "send -X search-backward-incremental '%%'"
+
+  There are also some new commmands available with send -X, such as
+  copy-pipe-and-cancel.
+* set-remain-on-exit has gone -- can be achieved with hooks instead.
+* Hooks: before hooks have been removed and only a selection of commands now
+  have after hooks (they are no longer automatic). Additional hooks have been
+  added.
+* The xterm-keys option now defaults to on.
+
+Normal Changes
+==============
+
+* Support for mouse double and triple clicks.
+* BCE (Background Colour Erase) is now supported.
+* All occurrences of a search string in copy mode are now highlighted;
+  additionally, the number of search results is displayed. The highlighting
+  updates interactively with the default emacs key bindings (incremental
+  search).
+* source-file now understands glob patterns.
+* Formats now have simple comparisons:
+
+    #{==:a,b}
+    #{!=:a,b}
+
+* There are the following new formats:
+
+  - #{version} -- the tmux server version;
+  - #{client_termtype} -- the terminal type of the client;
+  - #{client_name} -- the name of a client;
+  - #{client_written} -- the number of bytes written to the client.
+
+* The configuration file now accepts %if/%endif conditional blocks which are
+  processed when it is parsed; the argument is a format string (useful with the
+  new format comparison options).
+* detach-client now has -E to execute a command replacing the client instead of
+  exiting.
+* Add support for custom command aliases, this is an array option which
+  contains items of the form "alias=command". This is consulted when an
+  unknown command is parsed.
+* break-pane now has -n to specify the new window name.
+* OSC 52 support has been added for programs inside tmux to set a tmux buffer.
+* The mouse "all event" mode (1003) is now supported.
+* Palette setting is now possible (OSC 4 and 104).
+* Strikethrough support (a recent terminfo is required).
+* Grouped sessions can now be named (new -t).
+* terminal-overrides and update-environment are now array options (the previous
+  set -ag syntax should work without change).
+* There have been substantial performance improvements.
+
+CHANGES FROM 2.2 TO 2.3, 29 September 2016
+
+Incompatible Changes
+====================
+
+None.
+
+Normal Changes
+==============
+
+* New option 'pane-border-status' to add text in the pane borders.
+* Support for hooks on commands: 'after' and 'before' hooks.
+* 'source-file' understands '-q' to suppress errors for nonexistent files.
+* Lots of UTF8 improvements, especially on MacOS.
+* 'window-status-separator' understands #[] expansions.
+* 'split-window' understands '-f' for performing a full-width split.
+* Allow report count to be specified when using 'bind-key -R'.
+* 'set -a' for appending to user options (@foo) is now supported.
+* 'display-panes' can now accept a command to run, rather than always
+  selecting the pane.
+
+CHANGES FROM 2.1 TO 2.2, 10 April 2016
+
+Incompatible Changes
+====================
+
+* The format strings which referenced time have been removed.  Instead:
+
+  #{t:window_activity}
+
+can be used.
+
+* Support for TMPDIR has been removed.  Use TMUX_TMPDIR instead.
+* UTF8 detection now happens automatically if the client supports it, hence
+  the:
+
+  mouse-utf8
+  utf8
+
+  options has been removed.
+* The:
+
+  mouse_utf8_flag
+
+  format string has been removed.
+* The -I option to show-messages has been removed.  See:
+
+  #{t:start_time}
+
+  format option instead.
+
+Normal Changes
+==============
+
+* Panes are unzoomed with selectp -LRUD
+* New formats added:
+
+  #{scroll_position}
+  #{socket_path}
+  #{=10:...} -- limit to N characters (from the start)
+  #{=-10:...} -- limit to N characters (from the end)
+  #{t:...} -- used to format time-based formats
+  #{b:...} -- used to ascertain basename from string
+  #{d:...} -- used to ascertain dirname from string
+  #{s:...} -- used to perform substitutions on a string
+
+* Job output is run via the format system, so formats work again
+* If display-time is set to 0, then the indicators wait for a key to be
+  pressed.
+* list-keys and list-commands can be run without starting the tmux server.
+* kill-session learns -C to clear all alerts in all windows of the session.
+* Support for hooks (internal for now), but hooks for the following have been
+  implemented:
+
+  alert-bell
+  alert-silence
+  alert-activity
+  client-attached
+  client-detached
+  client-resized
+  pane-died
+  pane-exited
+
+* RGB (24bit) colour support.  The 'Tc' flag must be set in the external TERM
+  entry (using terminal-overrides or a custom terminfo entry).
+
+CHANGES FROM 2.0 TO 2.1, 18 October 2015
+
+Incompatible Changes
+====================
+
+* Mouse-mode has been rewritten.  There's now no longer options for:
+	- mouse-resize-pane
+	- mouse-select-pane
+	- mouse-select-window
+	- mode-mouse
+
+  Instead there is just one option:  'mouse' which turns on mouse support
+  entirely.
+* 'default-terminal' is now a session option.  Furthermore, if this is set
+  to 'screen-*' then emulate what screen does.  If italics are wanted, this
+  can be set to 'tmux' but this is still new and not necessarily supported
+  on all platforms with older ncurses installs.
+* The c0-* options for rate-limiting have been removed.  Instead, a backoff
+  approach is used.
+
+Normal Changes
+==============
+
+* New formats:
+	- session_activity
+	- window_linked
+	- window_activity_format
+	- session_alerts
+	- session_last_attached
+	- client_pid
+	- pid
+* 'copy-selection', 'append-selection', 'start-named-buffer' now understand
+  an '-x' flag to prevent it exiting copying mode.
+* 'select-pane' now understands '-P' to set window/pane background colours.
+* 'renumber-windows' now understands windows which are unlinked.
+* 'bind' now understands multiple key tables.  Allows for key-chaining.
+* 'select-layout' understands '-o' to undo the last layout change.
+* The environment is updated when switching sessions as well as attaching.
+* 'select-pane' now understands '-M' for marking a pane.  This marked pane
+  can then be used with commands which understand src-pane specifiers
+  automatically.
+* If a session/window target is prefixed with '=' then only an exact match
+  is considered.
+* 'move-window' understands '-a'.
+* 'update-environment' understands '-E' when attach-session is used on an
+  already attached client.
+* 'show-environment' understands '-s' to output Bourne-compatible commands.
+* New option: 'history-file' to save/restore command prompt history.
+* Copy mode is exited if the history is cleared whilst in copy-mode.
+* 'copy-mode' learned '-e' to exit copy-mode when scrolling to end.
+
+CHANGES FROM 1.9a TO 2.0, 06 March 2015
+
+Incompatible Changes
+====================
+
+* The choose-list command has been removed.
+* 'terminal-overrides' is now a server option, not a session option.
+* 'message-limit' is now a server option, not a session option.
+* 'monitor-content' option has been removed.
+* 'pane_start_path' option has been removed.
+* The "info" mechanism which used to (for some commands) provide feedback
+  has been removed, and like other commands, they now produce nothing on
+  success.
+
+Normal Changes
+==============
+
+* tmux can now write an entry to utmp if the library 'utempter' is present
+  at compile time.
+* set-buffer learned append mode (-a), and a corresponding
+  'append-selection' command has been added to copy-mode.
+* choose-mode now has the following commands which can be bound:
+	- start-of-list
+	- end-of-list
+	- top-line
+	- bottom-line
+
+* choose-buffer now understands UTF-8.
+* Pane navigation has changed:
+	- The old way of always using the top or left if the choice is ambiguous.
+	- The new way of remembering the last used pane is annoying if the
+	  layout is balanced and the leftmost is obvious to the user (because
+	  clearly if we go right from the top-left in a tiled set of four we want
+	  to end up in top-right, even if we were last using the bottom-right).
+
+      So instead, use a combination of both: if there is only one possible
+      pane alongside the current pane, move to it, otherwise choose the most
+      recently used of the choice.
+* 'set-buffer' can now be told to give names to buffers.
+* The 'new-session', 'new-window', 'split-window', and 'respawn-pane' commands
+  now understand multiple arguments and handle quoting problems correctly.
+* 'capture-pane' understands '-S-' to mean the start of the pane, and '-E-' to
+  mean the end of the pane.
+* Support for function keys beyond F12 has changed.  The following explains:
+	- F13-F24 are S-F1 to S-F12
+	- F25-F36 are C-F1 to C-F12
+	- F37-F48 are C-S-F1 to C-S-F12
+	- F49-F60 are M-F1 to M-F12
+	- F61-F63 are M-S-F1 to M-S-F3
+
+ Therefore, F13 becomes a binding of S-F1, etc.
+* Support using pane id as part of session or window specifier (so % means
+  session-of-%1 or window-of-%1) and window id as part of session
+  (so @1 means session-of-@1).
+* 'copy-pipe' command now understands formats via -F
+* 'if-shell'  command now understands formats via -F
+* 'split-window' and 'join-window' understand -b to create the pane to the left
+  or above the target pane.
+
+CHANGES FROM 1.9 TO 1.9a, 22 February 2014
+
+NOTE: This is a bug-fix release to address some important bugs which just
+missed the 1.9 deadline, but were found afterwards.
+
+Normal Changes
+==============
+
+* Fix crash due to uninitialized lastwp member of layout_cell
+* Fix -fg/-bg/-style with 256 colour terminals.
+
+CHANGES FROM 1.8 TO 1.9, 20 February 2014
+
+NOTE:  This release has bumped the tmux protocol version.  It is therefore
+advised that the prior tmux server is restarted when this version of tmux is
+installed, to avoid protocol mismatch errors for newer clients trying to
+talk to an older running tmux server.
+
+Incompatible Changes
+====================
+
+* 88 colour support has been removed.
+* 'default-path' has been removed.  The new-window command accepts '-c' to
+  cater for this.  The previous value of "." can be replaced with: 'neww -c
+  $PWD', the previous value of '' which meant current path of the pane can
+  be specified as:  'neww -c "#{pane_current_path}"'
+
+Deprecated Changes
+==================
+
+* The single format specifiers:  #A -> #Z (where defined) have been
+  deprecated and replaced with longer-named equivalents, as listed in the
+  FORMATS section of the tmux manpage.
+* The various foo-{fg,bg,attr} commands have been deprecated and replaced
+  with equivalent foo-style option instead.  Currently this is still
+  backwards-compatible, but will be removed over time.
+
+Normal Changes
+==============
+
+* A new environment variable TMUX_TMPDIR is now honoured, allowing the
+  socket directory to be set outside of TMPDIR (/tmp/ if not set).
+* If -s not given to swap-pane the current pane is assumed.
+* A #{pane_synchronized} format specifier has been added to be a conditional
+  format if a pane is in a synchronised mode (c.f. synchronize-panes)
+* Tmux now runs under Cygwin natively.
+* Formats can now be nested within each other and expanded accordingly.
+* Added 'automatic-rename-format' option to allow the automatic rename
+  mechanism to use something other than the default of
+  #{pane_current_command}.
+* new-session learnt '-c' to specify the starting directory for that session
+  and all subsequent windows therein.
+* The session name is now shown in the message printed to the terminal when
+  a session is detached.
+* Lots more format specifiers have been added.
+* Server race conditions have been fixed; in particular commands are not run
+  until after the configuration file is read completely.
+* Case insensitive searching in tmux's copy-mode is now possible.
+* attach-session and switch-client learnt the '-t' option to accept a window
+  and/or a pane to use.
+* Copy-mode is only exited if no selection is in progress.
+* Paste key in copy-mode is now possible to enter text from the clipboard.
+* status-interval set to '0' now works as intended.
+* tmux now supports 256 colours running under fbterm.
+* Many bug fixes!
+
+CHANGES FROM 1.7 TO 1.8, 26 March 2013
+
+Incompatible Changes
+====================
+
+* layout redo/undo has been removed.
+
+Normal Changes
+==============
+
+* Add halfpage up/down bindings to copy mode.
+* Session choosing fixed to work with unattached sessions.
+* New window options window-status-last-{attr,bg,fg} to denote the last
+  window which was active.
+* Scrolling in copy-mode now scrolls the region without moving the mouse
+  cursor.
+* run-shell learnt '-t' to specify the pane to use when displaying output.
+* Support for middle-click pasting.
+* choose-tree learns '-u' to start uncollapsed.
+* select-window learnt '-T' to toggle to the last window if it's already
+  current.
+* New session option 'assume-paste-time' for pasting text versus key-binding
+  actions.
+* choose-* commands now work outside of an attached client.
+* Aliases are now shown for list-commands command.
+* Status learns about formats.
+* Free-form options can be set with set-option if prepended with an '@'
+  sign.
+* capture-pane learnt '-p' to send to stdout, and '-e' for capturing escape
+  sequences, and '-a' to capture the alternate screen, and '-P' to dump
+  pending output.
+* Many new formats added (client_session, client_last_session, etc.)
+* Control mode, which is a way for a client to send tmux commands.
+  Currently more useful to users of iterm2.
+* resize-pane learnt '-x' and '-y' for absolute pane sizing.
+* Config file loading now reports errors from all files which are loaded via
+  the 'source-file' command.
+* 'copy-pipe' mode command to copy selection and pipe the selection to a
+  command.
+* Panes can now emit focus notifications for certain applications
+  which use those.
+* run-shell and if-shell now accept formats.
+* resize-pane learnt '-Z' for zooming a pane temporarily.
+* new-session learnt '-A' to make it behave like attach-session.
+* set-option learnt '-o' to prevent setting an option which is already set.
+* capture-pane and show-options learns '-q' to silence errors.
+* New command 'wait-for' which blocks a client until woken up again.
+* Resizing panes will now reflow the text inside them.
+* Lots and lots of bug fixes, fixing memory-leaks, etc.
+* Various manpage improvements.
+
+CHANGES FROM 1.6 TO 1.7, 13 October 2012
+
+* tmux configuration files now support line-continuation with a "\" at the
+  end of a line.
+* New option status-position to move the status line to the top or bottom of
+  the screen.
+* Enforce history-limit option when clearing the screen.
+* Give each window a unique id, like panes but prefixed with @.
+* Add pane id to each pane in layout description (while still accepting
+  the old form).
+* Provide defined ways to set the various default-path possibilities: ~
+  for home directory, . for server start directory, - for session start
+  directory and empty for the pane's working directory (the default). All
+  can also be used as part of a relative path (eg -/foo). Also provide -c
+  flags to neww and splitw to override default-path setting.
+* Add -l flag to send-keys to send input literally (without translating
+  key names).
+* Allow a single option to be specified to show-options to show just that
+  option.
+* New command "move-pane" (like join-pane but allows the same window).
+* join-pane and move-pane commands learn "-b" option to place the pane to
+  the left or above.
+* Support for bracketed-paste mode.
+* Allow send-keys command to accept hex values.
+* Add locking around "start-server" to avoid race-conditions.
+* break-pane learns -P/-F arguments for display formatting.
+* set-option learns "-q" to make it quiet, and not print out anything.
+* copy mode learns "wrap-search" option.
+* Add a simple form of output rate limiting by counting the number of
+  certain C0 sequences (linefeeds, backspaces, carriage returns) and if it
+  exceeds a threshold (current default 250/millisecond), start to redraw
+  the pane every 100 milliseconds instead of making each change as it
+  comes. Two configuration options - c0-change-trigger and
+  c0-change-interval.
+* find-window learns new flags:  "-C", "-N", "-T" to match against either or
+  all of a window's content, name, or title.  Defaults to all three options
+  if none specified.
+* find-window automatically selects the appropriate pane for the found
+  matches.
+* show-environment can now accept one option to show that environment value.
+* Exit mouse mode when end-of-screen reached when scrolling with the mouse
+  wheel.
+* select-layout learns -u and -U for layout history stacks.
+* kill-window, detach-client, kill-session all  learn "-a" option for
+  killing all but the current thing specified.
+* move-window learns "-r" option to renumber window sequentially in a
+  session.
+* New session option "renumber-windows" to automatically renumber windows in
+  a session when a window is closed.  (see "move-window -r").
+* Only enter copy-mode on scroll up.
+* choose-* and list-* commands all use "-F" for format specifiers.
+* When spawning external commands, the value from the "default-shell" option
+  is now used, rather than assuming /bin/sh.
+* New choose-tree command to render window/sessions as a tree for selection.
+* display-message learns new format options.
+* For linked-windows across sessions, all flags for that window are now
+  cleared across sessions.
+* Lots and lots of bug fixes, fixing memory-leaks, etc.
+* Various manpage improvements.
+
+CHANGES FROM 1.5 TO 1.6, 23 January 2012
+
+* Extend the mode-mouse option to add a third choice which means the mouse
+  does not enter copy mode.
+* Add a -r flag to switch-client to toggle the client read-only flag.
+* Add pane-base-index option.
+* Support \ for line continuation in the configuration file.
+* Framework for more powerful formatting of command output and use it for
+  list-{panes,windows,sessions}. This allows more descriptive replacements
+  (such as #{session_name}) and conditionals.
+* Mark dead panes with some text saying they are dead.
+* Reject $SHELL if it is not a full path.
+* Add -S option to refresh-client to redraw status line.
+* Add an else clause for if-shell.
+* Try to resolve relative paths for loadb and saveb (first, using client
+  working directory, if any, then default-path or session working directory).
+* Support for \e[3J to clear the history and send the corresponding
+  terminfo code (E3) before locking.
+* When in copy mode, make repeat count indicate buffer to replace, if used.
+* Add screen*:XT to terminal-overrides for tmux-in-tmux.
+* Status-line message attributes added.
+* Move word-separators to be a session rather than window option.
+* Change the way the working directory for new processes is discovered. If
+  default-path isn't empty, it is used. Otherwise, if a new window is created
+  from the command-line, the working directory of the client is used. If not,
+  platform specific code is used to retrieve the current working directory
+  of the process in the active pane. If that fails, the directory where the
+  session was created is used, instead.
+* Do not change the current pane if both mouse-select-{pane,window} are
+  enabled.
+* Add \033[s and \033[u to save and restore cursor position.
+* Allow $HOME to be used as default-path.
+* Add CNL and CPL escape sequences.
+* Calculate last position correctly for UTF-8 wide characters.
+* Add an option allow-rename to disable the window rename escape sequence.
+* Attributes for each type of status-line alert (ie bell, content and
+  activity) added. Therefore, remove the superfluous options
+  window-status-alert-{attr,bg,fg}.
+* Add a -R flag to send-keys to reset the terminal.
+* Add strings to allow the aixterm bright colours to be used when
+  configuring colours.
+* Drop the ability to have a list of keys in the prefix in favour of two
+  separate options, prefix and prefix2.
+* Flag -2 added to send-prefix to send the secondary prefix key.
+* Show pane size in top right of display panes mode.
+* Some memory leaks plugged.
+* More command-prompt editing improvements.
+* Various manpage improvements.
+* More Vi mode improvements.
+
+CHANGES FROM 1.4 TO 1.5, 09 July 2011
+
+* Support xterm mouse modes 1002 and 1003.
+* Change from a per-session stack of buffers to one global stack. This renders
+  copy-buffer useless and makes buffer-limit now a server option.
+* Fix most-recently-used choice by avoiding reset the activity timer for
+  unattached sessions every second.
+* Add a -P option to new-window and split-window to print the new window or
+  pane index in target form (useful to pass it into other commands).
+* Handle a # at the end of a replacement string (such as status-left)
+  correctly.
+* Support for UTF-8 mouse input (\033[1005h) which was added in xterm 262.
+  If the new mouse-utf8 option is on, UTF-8 mouse input is enabled for all
+  UTF-8 terminals. The option defaults to on if LANG etc are set in the same
+  manner as the utf8 option.
+* Support for HP-UX.
+* Accept colours of the hex form #ffffff and translate to the nearest from the
+  xterm(1) 256-colour set.
+* Clear the non-blocking IO flag (O_NONBLOCK) on the stdio file descriptors
+  before closing them (fixes things like "tmux ls && cat").
+* Use TMPDIR if set.
+* Fix next and previous session functions to actually work.
+* Support -x and -y for new-session to specify the initial size of the window
+  if created detached with -d.
+* Make bind-key accept characters with the top-bit-set and print them as octal.
+* Set $TMUX without the session when background jobs are run.
+* Simplify the way jobs work and drop the persist type, so all jobs are
+  fire-and-forget.
+* Accept tcgetattr/tcsetattr(3) failure, fixes problems with fatal() if the
+  terminal disappears while locked.
+* Add a -P option to detach to HUP the client's parent process (usually causing
+  it to exit as well).
+* Support passing through escape sequences to the underlying terminal by using
+  DCS with a "tmux;" prefix.
+* Prevent tiled producing a corrupt layout when only one column is needed.
+* Give each pane created in a tmux server a unique id (starting from 0), put it
+  in the TMUX_PANE environment variable and accept it as a target.
+* Allow a start and end line to be specified for capture-pane which may be
+  negative to capture part of the history.
+* Add -a and -s options to lsp to list all panes in the server or session
+  respectively. Likewise add -s to lsw.
+* Change -t on display-message to be target-pane for the #[A-Z] replacements
+  and add -c as target-client.
+* The attach-session command now prefers the most recently used unattached
+  session.
+* Add -s option to detach-client to detach all clients attached to a session.
+* Add -t to list-clients.
+* Change window with mouse wheel over status line if mouse-select-window is on.
+* When mode-mouse is on, automatically enter copy mode when the mouse is
+  dragged or the mouse wheel is used. Also exit copy mode when the mouse wheel
+  is scrolled off the bottom.
+* Provide #h character pair for short hostname (no domain).
+* Don't use strnvis(3) for the title as it breaks UTF-8.
+* Use the tsl and fsl terminfo(5) capabilities to update terminal title and
+  automatically fill them in on terminals with the XT capability (which means
+  their title setting is xterm-compatible).
+* Add a new option, mouse-resize-pane. When on, panes may be resized by
+  dragging their borders.
+* Fix crash by resetting last pane on {break,swap}-pane across windows.
+* Add three new copy-mode commands - select-line, copy-line, copy-end-of-line.
+* Support setting the xterm clipboard when copying from copy mode using the
+  xterm escape sequence for the purpose (if xterm is configured to allow it).
+* Support xterm(1) cursor colour change sequences through terminfo(5) Cc
+  (set) and Cr (reset) extensions.
+* Support DECSCUSR sequence to set the cursor style with two new terminfo(5)
+  extensions, Cs and Csr.
+* Make the command-prompt custom prompts recognize the status-left option
+  character pairs.
+* Add a respawn-pane command.
+* Add a couple of extra xterm-style keys that gnome terminal provides.
+* Allow the initial context on prompts to be set with the new -I option to
+  command-prompt. Include the current window and session name in the prompt
+  when renaming and add a new key binding ($) for rename session.
+* Option bell-on-alert added to trigger the terminal bell when there is an
+  alert.
+* Change the list-keys format so that it shows the keys using actual tmux
+  commands which should be able to be directly copied into the config file.
+* Show full targets for lsp/lsw -a.
+* Make confirm-before prompt customizable with -p option like command-prompt
+  and add the character pairs #W and #P to the default kill-{pane,window}
+  prompts.
+* Avoid sending data to suspended/locked clients.
+* Small memory leaks in error paths plugged.
+* Vi mode improvements.
+
+CHANGES FROM 1.3 TO 1.4, 27 December 2010
+
+* Window bell reporting fixed.
+* Show which pane is active in the list-panes output.
+* Backoff reworked.
+* Prevent the server from dying when switching into copy mode when already
+  in a different mode.
+* Reset running jobs when the status line is enabled or disabled.
+* Simplify xterm modifier detection.
+* Avoid crashing in copy mode if the screen size is too small for the
+  indicator.
+* Flags -n and -p added to switch-client.
+* Use UTF-8 line drawing characters on UTF-8 terminals, thus fixing some
+  terminals (eg putty) which disable the vt100 ACS mode switching sequences
+  in UTF-8 mode. On terminals without ACS, use ASCII equivalents.
+* New server option exit-unattached added.
+* New session option destroy-unattached added.
+* Fall back on normal session choice method if $TMUX exists but is invalid
+  rather than rejecting.
+* Mark repeating keys with "(repeat)" in the key list.
+* When removing a pane, don't change the active pane unless the active pane
+  is actually the one being removed.
+* New command last-pane added.
+* AIX fixes.
+* Flag -a added to unbind-key.
+* Add XAUTHORITY to update-environment.
+* More info regarding window and pane flags is now shown in list-*.
+* If VISUAL or EDITOR contains "vi" configure mode-keys and status-key to vi.
+* New window option monitor-silence and session option visual-silence added.
+* In the built-in layouts distribute the panes more evenly.
+* Set the default value of main-pane-width to 80 instead of 81.
+* Command-line flag -V added.
+* Instead of keeping a per-client prompt history make it global.
+* Fix rectangle copy to behave like emacs (the cursor is not part of the
+  selection on the right edge but on the left it is).
+* Flag -l added to switch-client.
+* Retrieve environment variables from the global environment rather than
+  getenv(3), thus allowing them to be updated during the configuration file.
+* New window options other-pane-{height,width} added.
+* More minor bugs fixed and manpage improvements.
+
+CHANGES FROM 1.2 TO 1.3, 18 July 2010
+
+* New input parser.
+* Flags to move through panes -UDLR added to select-pane.
+* Commands up-pane, and down-pane removed, since equivalent behaviour is now
+  available through the target flag (-t:+ and -t:-).
+* Jump-forward/backward in copy move (based on vi's F, and f commands).
+* Make paste-buffer accept a pane as a target.
+* Flag -a added to new-window to insert a window after an existing one, moving
+  windows up if necessary.
+* Merge more mode into copy mode.
+* Run job commands explicitly in the global environment (which can be modified
+  with setenv -g), rather than with the environment tmux started with.
+* Use the machine's hostname as the default title, instead of an empty string.
+* Prevent double free if the window option remain-on-exit is set.
+* Key string conversions rewritten.
+* Mark zombie windows as dead in the choose-window list.
+* Tiled layout added.
+* Signal handling reworked.
+* Reset SIGCHLD after fork to fix problems with some shells.
+* Select-prompt command removed. Therefore, bound ' to command-prompt -p index
+  "select-window -t:%%" by default.
+* Catch SIGHUP and terminate if running as a client, thus avoiding clients from
+  being left hanging around when, for instance, a SSH session is disconnected.
+* Solaris 9 fixes (such as adding compat {get,set}env(3) code).
+* Accept none instead of default for attributes.
+* Window options window-status-alert-{alert,bg,fg} added.
+* Flag -s added to the paste-buffer command to specify a custom separator.
+* Allow dragging to make a selection in copy mode if the mode-mouse option is
+  set.
+* Support the mouse scroll wheel.
+* Make pipe-pane accept special character sequences (eg #I).
+* Fix problems with window sizing when starting tmux from .xinitrc.
+* Give tmux sockets (but not the containing folder) group permissions.
+* Extend the target flags (ie -t) to accept an offset (for example -t:+2), and
+  make it wrap windows, and panes.
+* New command choose-buffer added.
+* New server option detach-on-destroy to set what happens to a client when the
+  session it is attached to is destroyed. If on (default), the client is
+  detached. Otherwise, the client is switched to the most recently active of
+  the remaining sessions.
+* The commands load-buffer, and save-buffer now accept a dash (-) as the file
+  to read from stdin, or write to stdout.
+* Custom layouts added.
+* Additional code reduction, bug fixes, and manpage enhancements.
+
+CHANGES FROM 1.1 TO 1.2, 10 March 2010
+
+* Switch to libevent.
+* Emulate the ri (reverse index) capability, ergo allowing tmux to at least
+  start on Sun consoles (TERM=sun, or sun-color).
+* Assign each entry a number, or lowercase letter in choose mode, and accept
+  that as a shortcut key.
+* Permit top-bit-set characters to be entered in the status line.
+* Mark no-prefix keys with (no prefix), rather than [] in list-keys.
+* New command show-messages (alias showmsgs), and new session option
+  message-limit, to show a per-client log of status lines messages up to the
+  number defined by message-limit.
+* Do not interpret #() for display-message to avoid leaking commands.
+* New window options window-status-format, and window-status-current-format to
+  control the format of each window in the status line.
+* Add a -p flag to display-message to print the output, instead of displaying
+  it in the status line.
+* Emulate il1, dl1, ich1 to run with vt100 feature set.
+* New command capture-pane (alias capturep) to copy the entire pane contents
+  to a paste buffer.
+* Avoid duplicating code by adding a -w flag to set-option, and show-options to
+  set, and show window options. The commands set-window-option, and
+  show-window-options are now aliases.
+* Panes can now be referred to as top, bottom, top-left, etc.
+* Add server-wide options, which can be set with set-option -s, and shown with
+  show-options -s.
+* New server option quiet (like -q from the command line).
+* New server option escape-time to set the timeout used to detect if escapes
+  are alone, part of a function key, or meta sequence.
+* New session options pane-active-border-bg, pane-active-border-fg,
+  pane-border-bg, and pane-border-fg to set pane colours.
+* Make split-window accept a pane target, instead of a window.
+* New command join-pane (alias joinp) to split, and move an existing pane into
+  the space (the opposite of break-pane), thus simplifying calls to
+  split-window, followed by move-window.
+* Permit S- prefix on keys for shift when the terminal/terminfo supports them.
+* Window targets (-t flag) can now refer to the last window (!), next (+), and
+  previous (-) window by number.
+* Mode keys to jump to the bottom/top of history, end of the next word, scroll
+  up/down, and reverse search in copy mode.
+* New session option display-panes-active-colour to display the active pane in
+  a different colour with the display-panes command.
+* Read the socket path from $TMUX if it's present, and -L, and -S are not
+  given.
+* Vi-style mode keys B, W, and E to navigate between words in copy mode.
+* Start in more mode when configuration file errors are detected.
+* Rectangle copy support added.
+* If attach-session was specified with the -r flag, make the client read-only.
+* Per-window alternate-screen option.
+* Make load-buffer work with FIFOs.
+* New window option word-separators to set the characters considered as word
+  separators in copy mode.
+* Permit keys in copy mode to be prefixed by a repeat count, entered with [1-9]
+  in vi mode, or M-[1-9] in emacs mode.
+* utf8 improvements.
+* As usual, additional code reduction, bug fixes, and manpage enhancements.
+
+CHANGES FROM 1.0 TO 1.1, 05 November 2009
+
+* New run-shell (alias run) command to run an external command without a
+  window, capture it's stdout, and send it to output mode.
+* Ability to define multiple prefix keys.
+* Internal locking mechanism removed. Instead, detach each client and run the
+  external command specified in the new session option lock-command (by default
+  lock -np), thus allowing the system password to be used.
+* set-password command, and -U command line flag removed per the above change.
+* Add support for -c command line flag to execute a shell command.
+* New lock-client (alias lockc), and lock-session (alias locks) commands to
+  lock a particular client, or all clients attached to a session.
+* Support C-n/C-p/C-v/M-v with emacs keys in choice mode.
+* Use : for goto line rather than g in vi mode.
+* Try to guess which client to use when no target client was specified. Finds
+  the current session, and if only one client is present, use it. Otherwise,
+  return the most recently used client.
+* Make C-Down/C-Up in copy mode scroll the screen down/up one line without
+  moving the cursor.
+* Scroll mode superseded by copy mode.
+* New synchronize-panes window option to send all input to all other panes in
+  the same window.
+* New lock-server session option to lock, when off (on by default), each
+  session when it has been idle for the lock-after-time setting. When on, the
+  entire server locks when all sessions have been idle for their individual
+  lock-after-time setting.
+* Add support for grouped sessions which have independent name, options,
+  current window, but where the linked windows are synchronized (ie creating,
+  killing windows are mirrored between the sessions). A grouped session may be
+  created by passing -t to new-session.
+* New mouse-select-pane session option to select the current pane with the
+  mouse.
+* Queue, and run commands in the background for if-shell, status-left,
+  status-right, and #() by starting each once every status-interval. Adds the
+  capability to call some programs which would previously cause the server to
+  hang (eg sleep/tmux). It also avoids running commands excessively (ie if used
+  multiple times, it will be run only once).
+* When a window is zombified and automatic-rename is on, append [dead] to the
+  name.
+* Split list-panes (alias lsp) off from list-windows.
+* New pipe-pane (alias pipep) to redirect a pane output to an external command.
+* Support for automatic-renames for Solaris.
+* Permit attributes to be turned off in #[] by prefixing with no (eg nobright).
+* Add H/M/L in vi mode, and M-R/M-r in emacs to move the cursor to the top,
+  middle, and bottom of the screen.
+* -a option added to kill-pane to kill all except current pane.
+* The -d command line flag is now gone (can be replaced by terminal-overrides).
+  Just use op/AX to detect default colours.
+* input/tty/utf8 improvements.
+* xterm-keys rewrite.
+* Additional code reduction, and bug fixes.
+
+CHANGES FROM 0.9 TO 1.0, 20 September 2009
+
+* Option to alter the format of the window title set by tmux.
+* Backoff for a while after multiple incorrect password attempts.
+* Quick display of pane numbers (C-b q).
+* Better choose-window, choose-session commands and a new choose-client command.
+* Option to request multiple responses when using command-prompt.
+* Improved environment handling.
+* Combine wrapped lines when pasting.
+* Option to override terminal settings (terminal-overrides).
+* Use the full range of ACS characters for drawing pane separator lines.
+* Customisable mode keys.
+* Status line colour options, with embedded colours in status-left/right, and
+  an option to centre the window list.
+* Much improved layouts, including both horizontal and vertical splitting.
+* Optional visual bell, activity and content indications.
+* Set the utf8 and status-utf8 options when the server is started with -u.
+* display-message command to show a message in the status line, by default some
+  information about the current window.
+* Improved current process detection on NetBSD.
+* unlink-window -k is now the same as kill-window.
+* attach-session now works from inside tmux.
+* A system-wide configuration file, /etc/tmux.conf.
+* A number of new commands in copy mode, including searching.
+* Panes are now specified using the target (-t) notation.
+* -t now accepts fnmatch(3) patterns and looks for prefixes.
+* Translate \r into \n when pasting.
+* Support for binding commands to keys without the prefix key
+* Support for alternate screen (terminfo smcup/rmcup).
+* Maintain data that goes off screen after reducing the window size, so it can
+  be restored when the size is increased again.
+* New if-shell command to test a shell command before running a tmux command.
+* tmux now works as the shell.
+* Man page reorganisation.
+* Many minor additions, much code tidying and several bug fixes.
+
+CHANGES FROM 0.8 TO 0.9, 01 July 2009
+
+* Major changes to build infrastructure: cleanup of makefiles and addition
+  of a configure script.
+* monitor-content window option to monitor a window for a specific fnmatch(3)
+  pattern. The find-window command also now accepts fnmatch(3) patterns.
+* previous-layout and select-layout commands, and a main-horizontal layout.
+* Recreate the server socket on SIGUSR1.
+* clear-history command.
+* Use ACS line drawing characters for pane separator lines.
+* UTF-8 improvements, and code to detect UTF-8 support by looking at
+  environment variables.
+* The resize-pane-up and resize-pane-down commands are now merged together
+  into a new resize-pane command with -U and -D flags.
+* confirm-before command to request a yes/no answer before executing dangerous
+  commands.
+* Status line bug fixes, support for UTF-8 (status-utf8 option), and a key to
+  paste from the paste buffer.
+* Support for some additional escape sequences and terminal features, including
+  better support for insert mode and tab stops.
+* Improved window resizing behaviour, modelled after xterm.
+* Some code reduction and a number of miscellaneous bug fixes.
+
+================================================================================
+
+On 01 June 2009, tmux was imported into the OpenBSD base system. From this date
+onward changes are logged as part of the normal CVS commit message to either
+OpenBSD or SourceForge CVS. This file will be updated to contain a summary of
+major changes with each release, and to mention important configuration or
+command syntax changes during development.
+
+The list of older changes is below.
+
+================================================================================
+
+21 May 2009
+
+* stat(2) files before trying to load them to avoid problems, for example
+  with "source-file /dev/zero".
+
+19 May 2009
+
+* Try to guess if the window is UTF-8 by outputting a three-byte UTF-8 wide
+  character and seeing how much the cursor moves. Currently tries to figure out
+  if this works by some stupid checks on the terminal, these need to be
+  rethought. Also might be better using a width 1 character rather than width 2.
+* If LANG contains "UTF-8", assume the terminal supports UTF-8, on the grounds
+  that anyone who configures it probably wants UTF-8. Not certain if this is
+  a perfect idea but let's see if it causes any problems.
+* New window option: monitor-content. Searches for a string in a window and if
+  it matches, highlight the status line.
+
+18 May 2009
+
+* main-horizontal layout and main-pane-height option to match vertical.
+* New window option main-pane-width to set the width of the large left pane with
+  main-vertical (was left-vertical) layout.
+* Lots of layout cleanup. manual layout is now manual-vertical.
+
+16 May 2009
+
+* select-layout command and a few default key bindings (M-0, M-1, M-2, M-9) to
+  select layouts.
+* Recreate server socket on SIGUSR1, per SF feature request 2792533.
+
+14 May 2009
+
+* Keys in status line (p in vi mode, M-y in emacs) to paste the first line
+  of the upper paste buffer. Suggested by Dan Colish.
+* clear-history command to clear a pane's history.
+* Don't force wrapping with \n when asked, let the cursor code figure it out.
+  Should fix terminals which use this to detect line breaks.
+* Major cleanup and restructuring of build infrastructure. Still separate files
+  for GNU and BSD make, but they are now hugely simplified at the expense of
+  adding a configure script which must be run before make. Now build and
+  install with:
+
+	$ ./configure && make && sudo make install
+
+04 May 2009
+
+* Use ACS line drawing characters for pane separator lines.
+
+30 April 2009
+
+* Support command sequences without a space before the semicolon, for example
+  "neww; neww" now works as well as "neww ; neww". "neww;neww" is still an
+  error.
+* previous-layout command.
+* Display the layout name in window lists.
+* Merge resize-pane-up and resize-pane-down into resize-pane with -U and -D
+  flags.
+
+29 April 2009
+
+* Get rid of compat/vis.* - only one function was used which is easily
+  replaced,and less compat code == good.
+
+27 April 2009
+
+* Avoid using the prompt history when the server is locked, and prevent any
+  input entered from being added to the client's prompt history.
+* New command, confirm-before (alias confirm), which asks for confirmation
+  before executing a command. Bound "&" and "x" by default to confirm-before
+  "kill-window" and confirm-before "kill-pane", respectively.
+
+23 April 2009
+
+* Support NEL, yet another way of making newline. Fixes the output from some
+  Gentoo packaging thing. Reported by someone on SF then logs that allowed a
+  fix sent by tcunha.
+* Use the xenl terminfo flag to detect early-wrap terminals like the FreeBSD
+  console. Many thanks for a very informative email from Christian Weisgerber.
+
+21 April 2009
+
+* tmux 0.8 released.
+
+17 April 2009
+
+* Remove the right number of characters from the buffer when escape then
+  a cursor key (or other key prefixed by \033) is pressed. Reported by
+  Stuart Henderson.
+
+03 April 2009
+
+* rotate-window command. -U flag (default) for up, -D flag for down.
+
+02 April 2009
+
+* Change scroll/pane redraws to only redraw the single pane affected rather
+  than the entire window.
+* If redrawing the region would mean redrawing > half the pane, just schedule
+  to redraw the entire window. Also add a flag to skip updating the window any
+  further if it is scheduled to be redrawn. This has the effect of batching
+  multiple redraws together.
+
+01 April 2009
+
+* Basic horizontal splitting and layout management. Still some redraw and other
+  issues - particularly, don't mix with manual pane resizing, be careful when
+  viewing from multiple clients and don't expect shell windows to redraw very
+  well after the layout is changed; generally cycling the layout a few times
+  will fix most problems. Getting this in for testing while I think about how
+  to deal with manual mode.
+
+  Split window as normal and cycle the layouts with C-b space. Some of the
+  layouts will work better when swap-pane comes along.
+
+31 March 2009
+
+* AIX port, thanks to cmihai for access to a box. Only tested on 6.1 with xlc
+  10.1 (make sure CC is set). Needs GNU make and probably ncurses (didn't try
+  plain curses). Also won't build with DEBUG, so comment the FDEBUG=1 line in
+  GNUmakefile.
+* Draw a vertical line on the right when the window size is less than the
+  terminal size. This is partly to shake out any horizontal limit bugs on the
+  way to horizontal splitting/pane tiling. Currently a bit slow since it has to
+  do a lot of redrawing but hopefully that will improve as I get some better
+  ideas for how to do it.
+* Fix remaining problems with copy and paste and UTF-8.
+
+28 March 2009
+
+* Better UTF-8 support, including combined characters. Unicode data is now
+  stored as UTF-8 in a separate array, the code does a lookup into this every
+  time it gets to a UTF-8 cell. Zero width characters are just appended onto
+  the UTF-8 data for the previous cell. This also means that almost no bytes
+  extra are wasted non-Unicode data (yay).
+
+  Still some oddities, such as copy mode skips over wide characters in a
+  strange way, and the code could do with some tidying.
+* Key repeating is now a property of the key binding not of the command.
+  Repeat is turned on when the key is bound with the -r flag to bind-key.
+  next/previous-window no longer repeat by default as it turned out to annoy
+  me.
+
+27 March 2009
+
+* Clear using ED when redrawing the screen. I foolishly assumed using spaces
+  would be equivalent and terminals would pick up on this, but apparently not.
+  This fixes copy and paste in xterm/rxvt.
+* Sockets in /tmp are now created in a subdirectory named, tmux-UID, eg
+  tmux-1000. The default socket is thus /tmp/tmux-UID/default. To start a
+  separate server, the new -L command line option should be used: this creates
+  a socket in the same directory with a different name ("-L main" will create
+  socket called "main"). -S should only be used to place the socket outside
+  /tmp. This makes sockets a little more secure and a bit more convenient to
+  use multiple servers.
+
+21 March 2009
+
+* New session flag "set-remain-on-exit" to set remain-on-exit flag for new
+  windows created in that session (like "remain-by-default" used to do). Not
+  perfectly happy about this, but until I can think of a good way to introduce
+  it generically (maybe a set of options in the session) this will do. Fixes
+  SF request 2527847.
+
+07 March 2009
+
+* Support for 88 colour terminals.
+* break-pane command to create a new window using an existing pane.
+
+02 March 2009
+
+* Make escape key timer work properly so escape+key can be used without
+  lightning fast key presses.
+
+13 February 2009
+
+* Redo mode keys slightly more cleanly and apply them to command prompt
+  editing. vi or emacs mode is controlled by the session option status-keys.
+
+12 February 2009
+
+* Looking up argv[0] is expensive, so just use p_comm for the window name which
+  is good enough. Also increase name update time to 500 ms.
+
+11 February 2009
+
+* Only use ri when actually at the top of the screen; just move the cursor up
+  otherwise.
+* FreeBSD's console wraps lines at $COLUMNS - 1 rather than $COLUMNS (the
+  cursor can never be beyond $COLUMNS - 1) and does not appear to support
+  changing this behaviour, or any of the obvious possibilities (turning off
+  right margin wrapping, insert mode). This is irritating, most notably because
+  it impossible to write to the very bottom-right of the screen without
+  scrolling. To work around this, if built on FreeBSD and run with a "cons"
+  $TERM, the bottom-right cell on the screen is omitted.
+* Emulate scroll regions (slowly) to support the few terminals which don't have
+  it (some of which don't really have any excuse).
+
+10 February 2009
+
+* No longer redraw the status line every status-interval unless it has actually
+  changed.
+
+08 February 2009
+
+* Don't treat empty arguments ("") differently when parsing configuration
+  file/command prompt rather than command line.
+* tmux 0.7 released.
+
+03 February 2009
+
+* New command, copy-buffer (alias copyb), to copy a session paste buffer to
+  another session.
+
+01 February 2009
+
+* The character pair #(command) may now contain (escaped) right parenthesis.
+
+30 January 2009
+
+* . now bound to "command-prompt 'move-window %%'" by default, from joshe.
+
+29 January 2009
+
+* Window options to set status line fg, bg and attributes for a single
+  window. Options are: window-status-fg, window-status-bg,
+  window-status-attr. Set to "default" to use the session status colours.
+
+  This allows quite neat things like:
+
+	$ cat ~/bin/xssh
+	#!/bin/sh
+
+	if [ ! -z "$TMUX" ]; then
+	case "$1" in
+    	natalya)
+	        tmux setw window-status-fg red >/dev/null
+		;;
+	natasha)
+        	tmux setw window-status-fg yellow >/dev/null
+		;;
+	esac
+	fi
+	ssh "$@"
+	[ ! -z "$TMUX" ] && tmux setw -u window-status-fg >/dev/null
+	$ alias ssh="~/bin/xssh"
+
+* Support #(command) in status-left, and status-right, which is displayed as
+  the first line of command's output (e.g. set -g status-right
+  "#(whoami)@#(hostname -s)"). Commands with )s aren't supported.
+
+28 January 2009
+
+* Support mouse in copy mode to move cursor. Can't do anything else at the
+  moment until other mouse modes are handled.
+* Better support for at least the most common variant of mouse input: parse it
+  and adjust for different panes. Also support mouse in window/session choice
+  mode.
+
+27 January 2009
+
+* Bring back the fancy window titles with session/window names: it is easy to
+  work around problems with elinks (see FAQ).
+* -u flag to scroll-mode and copy-mode to start scrolled one page
+  up. scroll-mode -u is bound to prefix,page-up (ppage) by default.
+* Allow status, mode and message attributes to be changed by three new options:
+  status-attr, mode-attr, message-attr. A comma-separated list is accepted
+  containing: bright, dim, underscore, blink, reverse, hidden, italics, for
+  example:
+
+	set -g status-attr bright,blink
+
+  From Josh Elsasser, thanks!
+
+26 January 2009
+
+* Be more clever about picking the right process to create the window name.
+* Don't balls up the terminal on UTF-8 combined characters. Don't support them
+  properly either - they are just discarded for the moment.
+
+25 January 2009
+
+* load-buffer command
+
+23 January 2009
+
+* Use reverse colours rather than swapping fg and bg for message, mode and
+  status line. This makes these usable on black and white terminals.
+* Better error messages when creating a session or window fails.
+* Oops. Return non-zero on error. Reported by Will Maier.
+
+21 January 2009
+
+* Handle SIGTERM (and kill-server which uses it), a bit more neatly - tidy
+  up properly and print a nicer message. Same effect though :-).
+* new-window now supports -k to kill target window if it exists.
+* Bring back split-window -p and -l options to specify the height a percentage
+  or as a number of lines.
+* Make window and session choice modes allow you to choose items in vi keys
+  mode (doh!). As a side-effect, this makes enter copy selection (as well
+  as C-w/M-w) when using emacs keys in copy mode. Reported by merdely.
+
+20 January 2009
+
+* Darwin support for automatic-rename from joshe; Darwin doesn't seem to have
+  a sane method of getting argv[0] and searching for the precise insane way
+  is too frustrating, so this just uses the executable name.
+* Try to change the window title to match the command running it in. This is
+  done by reading argv[0] from the process group leader of the group that owns
+  the tty (tcgetpgrp()). This can't be done portably so some OS-dependent code
+  is introduced (ugh); OpenBSD, FreeBSD and Linux are supported at the moment.
+
+  A new window flag, automatic-rename, is available: if this is set to off, the
+  window name is not changed. Specifying a name with the new-window,
+  new-session or rename-window commands will automatically set this flag to off
+  for the window in question. To disable it entirely set the option to off
+  globally (setw -g automatic-rename off).
+
+19 January 2009
+
+* Fix various stupid issues when the status line is turned off. Grr.
+* Use reverse attributes for clock and cursor, otherwise they do not
+  appear on black and white terminals.
+* An error in a command sequence now stops execution of that sequence.
+  Internally, each command code now passes a return code back rather than
+  talking to the calling client (if any) directly.
+* attach-session now tries to start the server if it isn't already started - if
+  no sessions are created in .tmux.conf this will cause an error.
+* Clean up starting server by making initial client get a special socketpair.
+
+18 January 2009
+
+* Unbreak UTF-8.
+* -a flag to next-window and previous-window to select the next or previous
+  window with activity or bell. Bound to M-n and M-p.
+* find-window command to search window names, titles and visible content (but
+  not history) for a string. If only one is found, the window is selected
+  otherwise a choice list is shown. This (as with the other choice commands)
+  only works from a key. Bound to "f" by default.
+* Cleaned up command printing code, also enclose arguments with spaces in "s.
+* Added command sequences. These are entered by separating each argument by a ;
+  argument (spaces on both sides), for example:
+
+	lsk ; lsc
+
+  To use a literal ; as the argument prefix it with \, for example:
+
+	bind x lsk \; lsc
+
+  Commands are executed from left to right. Also note that command sequences do
+  not support repeat-time repetition unless all commands making up the sequence
+  support it.
+* suspend-client command to suspend a client. Don't try to background it
+  though...
+* Mark attached sessions in sessions lists. Suggested by Simon Kuhnle.
+
+17 January 2009
+
+* tmux 0.6 released.
+
+15 January 2009
+
+* Support #H for hostname and #S for session name in status-left/right.
+* Two new commands, choose-window and choose-session which work only when bound
+  to a key and allow the window or session to be selected from a list. These
+  are now bound to "w" and "s" instead of the list commands.
+
+14 January 2009
+
+* Rework the prefix-time stuff. The option is now called repeat-time and
+  defaults to 500 ms. It only applies to a small subset of commands, currently:
+  up-pane, down-pane, next-window, previous-window, resize-pane-up,
+  resize-pane-down. These are the commands for which it is obviously useful,
+  having it for everything else was just bloody annoying.
+* The alt-up and alt-down keys now resize a pane by five lines at a time.
+* switch-pane is now select-pane and requires -p to select a pane. The
+  "o" key binding is changed to down-pane.
+* up-pane and down-pane commands, bound to arrow up and down by default.
+* Multiple vertical window splitting. Minimum pane size is four lines, an
+  (unhelpful) error will be shown if attempting to split a window with less
+  that eight lines. If the window is resized, as many panes are shown as can
+  fit without reducing them below four lines. There is (currently!) not a way
+  to show a hidden pane without making the window larger.
+
+  Note the -p and -l options to split-window are now gone, these may reappear
+  once I think them through again.
+* Server locking on inactivity (lock-after-time) is now disabled by default.
+
+13 January 2009
+
+* kill-pane command.
+
+12 January 2009
+
+* command-prompt now accepts a single argument, a template string. Any
+  occurrences of %% in this string are replaced by whatever is entered at the
+  prompt and the result is executed as a command. This allows things like (now
+  bound by default):
+
+  	 bind , command-prompt "rename-window %%"
+
+  Or my favourite:
+
+         bind x command-prompt "split-window 'man %%'"
+
+* Option to set prefix time, allowing multiple commands to be entered without
+  pressing the prefix key again, so long as they each typed within this time of
+  each other.
+* Yet more hacks for key handling. Think it is just about working now.
+* Two commands, resize-pane-up and resize-pane-down to resize a pane.
+* Make the window pane code handle panes of different sizes, and add a -l
+  and -p arguments to split-window to specify the new window size in lines
+  or as a percentage.
+
+11 January 2009
+
+* Vertical window splitting. Currently can only split a window into two panes.
+  New split-window command splits (bound to ") and switch-pane command (bound to
+  o) switches between panes.
+
+  close-pane, swap-pane commands are to follow. Also to come are pane resizing,
+  >2 panes, the ability to break a pane out to a full window and vice versa and
+  possibly horizontal splitting.
+
+  Panes are subelements of windows rather than being windows in their own
+  right. I tried to make them windows (so the splitting was at the session or
+  client level) but this rapidly became very complex and invasive. So in the
+  interests of having something working, I just made it so each window can have
+  two child processes instead of one (and it still took me 12 hours straight
+  coding). Now the concept is proven and much of the support code is there,
+  this may change in future if more flexibility is needed.
+* save-buffer command, from Tiago Cunha.
+
+10 January 2009
+
+* New option, lock-after-time. If there is no activity in the period specified
+  by this option (in seconds), tmux will lock the server. Default is 1800 (30
+  minutes), set to 0 to disable.
+* Server locking. Two new commands: set-password to set a password (a
+  preencrypted password may be specified with -c); and lock-server to lock the
+  server until the password is entered. Also an additional command line flag,
+  -U, to unlock from the shell. The default password is blank (any password
+  accepted). If specifying an encrypted password from encrypt(1) in .tmux.conf
+  with -c, don't forget to enclose it in single-quotes (') to prevent shell
+  variable expansion.
+* If a window is created from the command line, tmux will now use the same
+  current working directory for the new process. A new default-path option to
+  sets the working directory for processes created from keys or interactively
+  from the prompt.
+* New mode to display a large clock. Entered with clock-mode command (bound to
+  C-b t by default); two window options: clock-mode-colour and clock-mode-style
+  (12 or 24). This will probably be used as the basis for window locking.
+* New command, server-info, to show some server information and terminal
+  details.
+
+09 January 2009
+
+* Stop using ncurses variables and instead build a table of the codes we want
+  into an array for each terminal type. This makes the code a little more
+  untidy in places but gets rid of the awful global variables and calling
+  setterm all the time, and shoves all the ncurses-dependent mess into a single
+  file, tty-term.c. It also allows overriding single terminal codes, this is
+  used to fix rxvt on some platforms (where it is missing dch) and in future
+  may allow user customisation a la vim.
+* Update key handling code. Simplify, support ctrl properly and add a new
+  window option (xterm-keys) to output xterm key codes including ctrl and,
+  if available, alt and shift.
+
+08 January 2009
+
+* If built without DEBUG (the release versions), don't cause a fatal error if
+  the grid functions notice an input error, just log and ignore the
+  request. This might mean me getting shouted at less often when bugs kill
+  long-running sessions, at least in release versions.
+* Hopefully fix cursor out-of-bounds checking when writing to grid. When I
+  wrote the code I must have forgotten that the cursor can be one cell off the
+  right of the screen (yes, I know), so there were number of out-of-bounds/
+  overflow problems.
+
+07 January 2009
+
+* New flag to set and setw, -u, to unset an option (allowing it to inherit from)
+  the global options again.
+* Added more info messages for options changes.
+* A bit of tidying and reorganisation of options code.
+
+06 January 2009
+
+* Don't crash when backspacing if cursor is off the right of the screen,
+  reported by David Chisnall.
+* Complete words at any point inside command in prompt, also use option name
+  as well as command names.
+* Per-client prompt history of up to 100 items.
+* Use a splay tree for key bindings instead of an array. As a side-effect this
+  sorts them when listed.
+
+22 December 2008
+
+* Use the right keys for home and end.
+
+20 December 2008
+
+* Add vim mode for tmux configuration file to examples/, from Tiago Cunha.
+
+15 December 2008
+
+* New command, source-file (alias source), to load a configuration
+  file. Written by Tiago Cunha, many thanks.
+
+13 December 2008
+
+* Work around lack of dch. On Linux, the rxvt termcap doesn't have it (it is
+  lying, but we can't really start disbelieving termcaps...). This is a bit
+  horrible - I can see no way to do it without pretty much redrawing the whole
+  line, but it works...
+
+10 December 2008
+
+* glibc's getopt(3) is useless: it is not POSIX compliant without jumping
+  through non-portable hoops, and the method of resetting it is unclear (the
+  man page on my system says set optind to 1, but other sources say 0). So,
+  import OpenBSD's getopt_long.c into compat/ for use on Linux and use the
+  clearly documented optreset = optind = 1 method. This fixes some strange
+  issues with command parsing (getting the syntax wrong would prevent any
+  further commands being parsed).
+
+06 December 2008
+
+* Bring set/setw/show/showw into line with other commands. This means that by
+  default they now affect the current window (if any); the new -g flag must be
+  passed to set the global options. This changes the behaviour of set/show and
+  WILL BREAK CURRENT CONFIGURATIONS.
+
+  In summary, whether in the configuration file, the command prompt, or a key
+  binding, use -g to set a global option, use -t to specify a particular window
+  or session, or omit both to try and use the current window or session.
+
+  This makes set/show a bit of a pain but is the correct behaviour for
+  setw/showw and is the same as every other command, so we can put up with a
+  bit of pain for consistency.
+* Redo window options. They now work in the same way to session options with a
+  global options set. showw/setw commands now have similar syntax to show/set
+  (including the ability to use abbreviations).
+
+  PLEASE NOTE this includes the following configuration-breaking changes:
+
+  - remain-by-default is now GONE, use "setw -g remain-on-exit" to apply the
+    global window option instead;
+  - mode-keys is now a window option rather than session - use "setw [-g]
+    mode-keys" instead of set.
+
+  There are also some additions:
+
+  - message-fg and message-bg session options to control status line message
+    colours;
+  - mode-fg and mode-bg window options to set colours in window modes such as
+    copy mode.
+
+  The options code still a mess and now there is twice as much of it :-(.
+
+02 December 2008
+
+* Add support for including the window title in status-left or status-right
+  strings by including the character pair "#T". This may be prefixed with
+  a number to specify a maximum length, for example "#24T" to use at most
+  24 characters of the title.
+* Introduce two new options, status-left-length and status-right-length,
+  control the maximum length of left and right components of the status bar.
+* elinks (and possibly others) bypass the terminal and talk directly to X to
+  restore the window title when exiting. tmux can't know about this particular
+  bit of stupidity so the title ends up strange - the prefix isn't terribly
+  important and elinks is quite useful so just get rid of it.
+
+27 November 2008
+
+* Tweaks to support Dragonfly.
+
+17 November 2008
+
+* tmux 0.5 released.
+
+16 November 2008
+
+* New window option: "utf8"; this must be on (it is off by default) for UTF-8
+  to be parsed. The global/session option "utf8-default" controls the setting
+  for new windows.
+
+  This means that by default tmux does not handle UTF-8. To use UTF-8 by
+  default it is necessary to a) "set utf8-default on" in .tmux.conf b) start
+  tmux with -u on any terminal which support UTF-8.
+
+  It seems a bit unnecessary for this to be a per-window option but that is
+  the easiest way to do it, and it can't do any harm...
+* Enable default colours if op contains \033[39;49m, based on a report from
+  fulvio ciriaco.
+
+12 November 2008
+
+* Keep stack of last windows rather than just most recent; based on a diff from
+  joshe.
+
+04 November 2008
+
+* Don't try to redraw status line when showing a prompt or message; if it does,
+  the status timer is never reset so it redraws on every loop. Spotted by
+  joshe.
+
+09 October 2008
+
+* Translate 256 colours into 16 if 256 is not available, same as screen does.
+* Better support for OSC command (only to set window title now), and also
+  support using APC for the same purpose (some Linux default shell profiles do
+  this).
+
+25 September 2008
+
+* Large internal rewrite to better support 256 colours and UTF-8. Screen data
+  is now stored as single two-way array of structures rather than as multiple
+  separate arrays. Also simplified a lot of code.
+
+  Only external changes are three new flags, -2, -d and -u, which force tmux to
+  assume the terminal supports 256 colours, default colours (useful for
+  xterm-256color which lacks the AX flag), or UTF-8 respectively.
+
+10 September 2008
+
+* Split off colour conversion code from screen code.
+
+09 September 2008
+
+* Initial UTF-8 support. A bit ugly and with a limit of 4096 UTF-8
+  characters per window.
+
+08 September 2008
+
+* 256 colour support. tmux attempts to autodetect the terminal by looking
+  both at what ncurses reports (usually wrong for xterm) and checking if
+  the TERM contains "256col". For xterm TERM=xterm-256color is needed (as
+  well as a build that support 256 colours); this seems to work for rxvt
+  as well. On non-256 colour terminals, high colours are translated to white
+  foreground and black background.
+
+28 August 2008
+
+* Support OS X/Darwin thanks to bsd-poll.c from OpenSSH. Also convert
+  from clock_gettime(2) to gettimeofday(2) as OS X doesn't support the
+  former; microsecond accuracy will have to be sufficient ;-).
+
+07 August 2008
+
+* Lose some unused/useless wrapper functions.
+
+25 July 2008
+
+* Shell variables may now be defined and used in configuration file. Define
+  variables with:
+
+	VAR=1
+
+  And use with:
+
+        renamew ${VAR}
+	renamew "x${VAR}x"
+
+ Also some other fixes to make, for example, "abc""abc" work similarly to
+ the shell.
+
+24 July 2008
+
+* Finally lose inconsistently-used SCREEN_DEF* defines.
+* If cursor mode is on, switch the arrow keys from \033[A to \033OA.
+* Support the numeric keypad in both application and numbers mode. This is
+  different from screen which always keeps it in application mode.
+
+19 July 2008
+
+* Unbreak "set status" - tmux thought it was ambiguous, reported by rivo nurges.
+
+02 July 2008
+
+* Split vi and emacs mode keys into two tables and add an option (mode-keys)
+  to select between them. Default is emacs, use,
+
+     tmux set mode-keys vi
+
+  to change to vi.
+
+  vi mode uses space to start selection, enter to copy selection and escape
+  to clear selection.
+
+01 July 2008
+
+* Protocol versioning. Clients which identify as a different version from the
+  server will be rejected.
+* tmux 0.4 released.
+
+29 June 2008
+
+* Zombie windows. These are not closed when the child process dies. May be
+  set for a window with the new "remain-on-exit" option; the default setting
+  of this flag for new windows may be set with the "remain-by-default" session
+  option.
+
+  A window may be restarted with the respawn-window command:
+
+  	respawn-window [-k] [command]
+
+  If -k is given, any existing process running in the window is killed;
+  if command is omitted, the same command as when the window was first
+  created is used.
+
+27 June 2008
+
+* Handle nonexistent session or client to -t properly.
+
+25 June 2008
+
+* select-prompt command to allow a window to be selected at a prompt. Only
+  windows in the current session may be selected. Bound to ' by default.
+  Suggested by merdely.
+* move-window command. Requested by merdely.
+* Support binding alt keys (prefixed with M-). Change default to use
+  C- for ctrl keys (^ is still accepted as an alternative).
+* Slim down default key bindings: support lowercase only.
+* Handle escaped keys properly (parse eg \033b into a single key code) and
+  use this to change copy mode next/previous work to M-f and M-b to match
+  emacs.
+
+24 June 2008
+
+* Next word (C-n/w) and previous word (C-b/b) in copy mode.
+
+23 June 2008
+
+* list-commands command (alias lscm).
+* Split information about options into a table and use it to parse options
+  on input (allowing abbreviations) and to print them with show-options
+  (meaning that bell-action gets a proper string). This turned out a bit ugly
+  though :-/.
+
+22 June 2008
+
+* Do not translate black and white into default if the terminal supports
+  default colours. This was nice to force programs which didn't use default
+  colours to be properly transparent in rxvt/aterm windows with a background
+  image, but it causes trouble if someone redefines the default foreground and
+  background (to have black on white or something).
+
+21 June 2008
+
+* Naive tab completion in the command prompt. This only completes command
+  names if a) they are at the start of the text b) the cursor is at
+  the end of the text c) the text contains no spaces.
+* Only attempt to set the title where TERM looks like an xterm (contains
+  "xterm", "rxvt" or is "screen"). I hate this but I don't see a better way:
+  setting the title actually kills some other terminals pretty much dead.
+* Strip padding out of terminfo(5) strings. Currently the padding is just
+  ignored, this may need to be altered if there are any software terminals
+  out there that actually need it.
+
+20 June 2008
+
+* buffer-limit option to set maximum size of buffer stack. Default is 9.
+* Initial buffer improvements. Each session has a stack of buffers and each
+  buffer command takes a -b option to manipulate items on the stack. If -b
+  is omitted, the top entry is used. The following commands are currently
+  available:
+
+	set-buffer [-b index] [-t target-session] string
+	paste-buffer [-d] [-b index] [-t target-window]
+	delete-buffer [-b index] [-t target-session]
+	show-buffers [-t target-session]
+	show-buffer [-b index] [-t target-session]
+
+  -d to paste-buffer deletes the buffer after pasting it.
+* New option, display-time, sets the time status line messages stay on screen
+  (unless a key is pressed). Set in milliseconds, default is 750 (0.75 seconds).
+  The timer is only checked every 100 ms or so.
+
+19 June 2008
+
+* Use "status" consistently for status line option, and prefix for "prefix" key
+  option.
+* Allow commands to be entered at a prompt. This is triggered with the
+  command-prompt command, bound to : by default.
+* Show status messages properly, without blocking the server.
+
+18 June 2008
+
+* New option, set-titles. On by default, this attempts to set the window title
+  using the \e]2;...\007 xterm code.
+
+  Note that elinks requires the STY environment variable (used by screen) to be
+  set before it will set the window title. So, if you want window titles set by
+  elinks, set STY before running it (any value will do). I can't do this for all
+  windows since setting it to an invalid value breaks screen.
+* Show arrows at either end of status line when scrolled if more windows
+  exist. Highlight the arrow if a hidden window has activity or bell.
+* Scroll the status line to show the current window if necessary. Also handle
+  windows smaller than needed better (show a blank status line instead of
+  hanging or crashing).
+
+17 June 2008
+
+* tmux 0.3 released.
+
+16 June 2008
+
+* Add some information messages when window options are changed, suggested by
+  Mike Erdely. Also add a -q command-line option to suppress them.
+* show-window-options (showw) command.
+
+15 June 2008
+
+* show-options (show) command to show one or all options.
+
+14 June 2008
+
+* New window options: force-width and force-height. This will force a window
+  to an arbitrary width and height (0 for the default unlimited). This is
+  neat for emacs which doesn't have a sensible way to force hard wrapping at 80
+  columns. Also, don't try to be clever and use clr_eol when redrawing the
+  whole screen, it causes trouble since the redraw functions are used to draw
+  the blank areas too.
+* Clear the blank area below windows properly when they are smaller than client,
+  also add an indicator line to show the vertical limit.
+* Don't die on empty strings in config file, reported by Will Maier.
+
+08 June 2008
+
+* Set socket mode +x if any sessions are attached and -x if not.
+
+07 June 2008
+
+* Make status-interval actually changeable.
+
+06 June 2008
+
+* New window option: aggressive-resize. Normally, windows are resized to the
+  size of the smallest attached session to which they are linked. This means a
+  window only changes size when sessions are detached or attached, or they are
+  linked or unlinked from a session. This flag changes a window to be the size
+  of the smallest attached session for which it is the current window - it is
+  resized every time a session changes to it or away from it. This is nice for
+  things that handle SIGWINCH well (like irssi) and bad for things like shells.
+* The server now exits when no sessions remain.
+* Fix bug with inserting characters with TERM=xterm-color.
+
+05 June 2008
+
+* Completely reorganise command parsing. Much more common code in cmd-generic.c
+  and a new way of specifying windows, clients or sessions. Now, most commands
+  take a -t argument, which specifies a client, a session, or a window target.
+  Clients and sessions are given alone (sessions are fnmatch(3)d and
+  clients currently not), windows are give by (client|session):index. For
+  example, if a user is in session "1" window 0 on /dev/ttypi, these should all
+  be equivalent:
+
+	tmux renamew newname			(current session and window)
+	tmux renamew -t: newname		(current session and window)
+	tmux renamew -t:0 newname		(current session, window 0)
+	tmux renamew -t0 newname		(current session, window 0)
+	tmux renamew -t1:0 newname		(session 1, window 0)
+	tmux renamew -t1: newname		(session 1's current window)
+	tmux renamew -t/dev/ttypi newname	(client /dev/ttypi's current
+						 session and window)
+	tmux renamew -t/dev/ttypi: newname	(client /dev/ttypi's current
+						 session and window)
+	tmux renamew -t/dev/ttypi:0 newname	(client /dev/ttypi's current
+						 session, window 0)
+
+  This does have some downsides, for example, having to use -t on selectw,
+
+	tmux selectw -t7
+
+  is annoying. But then using non-flagged arguments would mean renaming the
+  current window would need to be something like:
+
+	tmux renamew : newname
+
+  It might be better not to try and be so consistent; comments to the usual
+  address ;-).
+* Infrastructure for printing arguments in list-keys output. Easy ones only for
+  now.
+
+04 June 2008
+
+* Add some vi(1) key bindings in copy mode, and support binding ^[, ^\, ^]
+  ^^ and ^_. Both from/prompted by Will Maier.
+* setw monitor-activity and set status without arguments now toggle the current
+  value; suggested by merdely.
+* New command set-window-option (alias setw) to set the single current window
+  option: monitor-activity to determine whether window activity is shown in
+  the status bar for that window (default off).
+* Change so active/bell windows are inverted in status line.
+* Activity monitoring - window with activity are marked in status line. No
+  way to disable this/filter windows yet.
+* Brought select-window command into line with everything else; it now uses
+  -i for the window index.
+* Strings to display on the left and right of the status bar may now be set
+  with the status-left and status-right options. These are passed through
+  strftime(3) before being displayed. The status bar is automatically updated
+  at an interval set by the status-interval option. The default is to display
+  nothing on the left and the date and time on the left; the default update
+  interval is 15 seconds.
+
+03 June 2008
+
+* Per session options. Setting options without specifying a session sets the
+  global options as normal (global options are inherited by all sessions);
+  passing -c or -s will set the option only for that session.
+* Because a client has a session attached, any command needing a session can
+  take a client and use its session. So, anything that used to accept -s now
+  accepts -c as well.
+* -s to specify session name now supports fnmatch(3) wildcards; if multiple
+  sessions are found, or if no -s is specified, the most newly created is used.
+* If no command is specified, assume new-session. As a byproduct, clean up
+  command default values into separate init functions.
+* kill-server command.
+
+02 June 2008
+
+* New command, start-server (alias "start"), to start the tmux server and do
+  nothing else. This is good if you have a configuration file which creates
+  windows or sessions (like me): in that case, starting the server the first
+  time tmux new is run is bad since it creates a new session and window (as
+  it is supposed to - starting the server is a side-effect).
+
+  Instead, I have a little script which does the equivalent of:
+
+  	tmux has -s0 2>/dev/null || tmux start
+  	tmux attach -d -s0
+
+  And I use it to start the server if necessary and attach to my primary
+  session.
+* Basic configuration file in ~/.tmux.conf or specified with -f. This is file
+  contains a set of tmux commands that are run the first time the server is
+  started. The configuration commands are executed before any others, so
+  if you have a configuration file that contains:
+
+	new -d
+	neww -s0
+
+  And you do the following without an existing server running:
+
+	tmux new
+
+  You will end up with two sessions, session 0 with two windows (created by
+  the configuration file) and your client attached to session 1 with one
+  window (created by the command-line command). I'm not completely happy with
+  this, it seems a little non-obvious, but I haven't yet decided what to do
+  about it.
+
+  There is no environment variable handling or other special stuff yet.
+
+  In the future, it might be nice to be able to have per-session configuration
+  settings, probably by having conditionals in the file (so you could, for
+  example, have commands to define a particular window layout that would only
+  be invoked if you called tmux new -smysession and mysession did not already
+  exist).
+* BIG CHANGE: -s and -c to specify session name and client name are now passed
+  after the command rather than before it. So, for example:
+
+	tmux -s0 neww
+
+  Becomes:
+
+	tmux neww -s0
+
+  This is to allow them to be used in the (forthcoming) configuration file
+  THIS WILL BREAK ANY CURRENT SCRIPTS OR ALIASES USING -s OR -c.
+
+01 June 2008
+
+* Bug fix: don't die if -k passed to link-window and the destination doesn't
+  exist.
+* New command, send-keys, will send a set of keys to a window.
+
+31 May 2008
+
+* Fix so tmux doesn't hang if the initial window fails for some reason. This
+  was highlighted by problems on Darwin, thanks to Elias Pipping for the report
+  and access to a test account. (tmux still won't work on Darwin since its
+  poll(2) is broken.)
+
+02 January 2008
+
+* Don't attempt to reset the tty on exit if it has been closed externally.
+
+06 December 2007
+
+* Restore checks for required termcap entries and add a few more obvious
+  emulations.
+* Another major reorganisation, this time of screen handling. A new set of
+  functions, screen_write_*, are now used to write to a screen and a tty
+  simultaneously. These are used by the input parser to update the base
+  window screen and also by the different modes which now interpose their own
+  screen.
+
+30 November 2007
+
+* Support \ek...\e\ to set window name.
+
+27 November 2007
+
+* Enable/disable mouse when asked, if terminal claims to support it. Mouse
+  sequences are just passed through unaltered for the moment.
+* Big internal reorganisation. Rather than leaving control of the tty solely in
+  the client and piping all data through a socket to it, change so that the
+  server opens the tty again and reads and writes to it directly. This avoids
+  a lot of buffering and copying. Also reorganise the redrawing stuff so that
+  everything goes through screen_draw_* - this makes the code simpler, but
+  still needs broken up more, and all the ways of writing to screens should be
+  more consistent.
+
+26 November 2007
+
+* Rather than shifting up one line at a time once the history is full,
+  shift by 10% of the history each time. This is faster.
+* Add ^A and ^E to copy mode to move to start-of-line/end-of-line.
+
+24 November 2007
+
+* Support for alt charset mode (VT100 graphics characters).
+
+23 November 2007
+
+* Mostly complete copy & paste. Copy mode entered with C-b [ (copy-mode
+  command). In copy mode, arrow keys/page up/page down/hjkl/C-u/C-f navigate,
+  space or C-space starts selection, and enter or C-w copies and (important!)
+  exits copy mode. C-b ] (paste-buffer) pastes into current window. No
+  extra utility keys (bol/eol/clear selection/etc), only one single buffer,
+  and no buffer manipulation commands (clear/view/etc) yet. The code is also
+  fugly :-(.
+* history-limit option to set maximum history. Does not apply retroactively to
+  existing windows! Lines take up a variable amount of space, but a reasonable
+  guess for an 80-column terminal is 250 KB per 1000 lines (of history used,
+  an empty history takes no space).
+
+21 November 2007
+
+* Create every line as zero length and only expand it as data is written,
+  rather than creating at full size immediately.
+* Make command output (eg list-keys) go to a scrollable window similar to
+  scroll mode.
+* Redo screen redrawing so it is a) readable b) split into utility functions
+  that can be used outside screen.c. Use these to make scroll mode only
+  redraw what it has to which gets rid of irritating flickering status box and
+  makes it much faster.
+* Full line width memory and horizontal scrolling in history.
+* Initial support for scroll history. = to enter scrolling mode, and then
+  vi keys or up/down/pgup/pgdown to navigate. Q to exit. No horizontal history
+  yet (need per-line sizes) and a few kinks to be worked out (resizing while in
+  history mode will probably cause trouble).
+
+20 November 2007
+
+* Fix format string error with "must specify a client" message. Also
+  sprinkle some printflike tags.
+* tmux 0.1 released.
+
+17 November 2007
+
+* (nicm) Add -k option to link-window to kill target window if it exists.
+
+16 November 2007
+
+* (nicm) Split in-client display into two columns. This is a hack but not a lot
+  more so than that bit is already and it helps with lots of keys.
+* (nicm) switch-client command to switch client between different sessions. This
+  is pretty cool:
+
+	$ tmux bind q switch 0
+	$ tmux bind w switch 1
+
+  Then you can switch between sessions 0 and 1 with a key :-).
+* (nicm) Accept "-c client-tty" on command line to allow client manipulation
+  commands, and change detach-/refresh-session to detach-/refresh-client (this
+  loses the -a behaviour, but at some point -session versions may return, and
+  -c will allow fnmatch(3)).
+* (nicm) List available commands on ambiguous command.
+
+12 November 2007
+
+* (nicm) If the terminal supports default colours (AX present), force black
+  background and white foreground to default. This is useful on transparent
+  *terms for programs which don't do it themselves (like most(1)).
+* (nicm) Fill in the rest of the man page.
+* (nicm) kill-session command.
+
+09 November 2007
+
+* (nicm) C-space is now "^ " not "^@".
+* (nicm) Support tab (\011).
+* (nicm) Initial man page outline.
+* (nicm) -V to show version.
+* (nicm) rename-session command.
+
+08 November 2007
+
+* (nicm) Check for required terminal capabilities on start.
+
+31 October 2007
+
+* (nicm) Linux port.
+
+30 October 2007
+
+* (nicm) swap-window command. Same as link-window but swaps windows.
+
+26 October 2007
+
+* (nicm) Saving scroll region on \e7 causes problems with ncmpc so I guess
+  it is not required.
+* (nicm) unlink-window command.
+* (nicm) link-window command to link an existing window into another session
+  (or another index in the same session). Syntax:
+
+	tmux -s dstname link-window [-i dstidx] srcname srcidx
+
+* (nicm) Redo window data structures. The global array remains, but each per-
+  session list is now a RB tree of winlink structures. This disassociates the
+  window index from the array size (allowing arbitrary indexes) which still
+  allowing windows to have multiple indexes.
+
+25 October 2007
+
+* (nicm) has-session command: checks if session exists.
+
+24 October 2007
+
+* (nicm) Support for \e6n to request cursor position. resize(1) now works.
+* (nicm) Support for \e7, \e8 save/restore cursor and attribute sequences.
+  Currently don't save mode (probably should). Also change some cases where
+  out-of-bound values are ignored to limit them to within range (there are
+  others than need to be checked too).
+
+23 October 2007
+
+* (nicm) Lift limit on session name passed with -s.
+* (nicm) Show size in session/window lists.
+* (nicm) Pass tty up to server when client identifies and add a list-clients
+  command to list connected clients.
+
+20 October 2007
+
+* (nicm) Add default-command option and change default to be $SHELL rather than
+  $SHELL -l. Also try to read shell from passwd db if $SHELL isn't present.
+
+19 October 2007
+
+* (nicm) -n on new-session is now -s, and -n is now the initial window name.
+  This was documented but not implemented :-/.
+* (nicm) kill-window command, bound to & by default (because it should be hard
+  to hit accidentally).
+* (nicm) bell-style option with three choices: "none" completely ignore bell;
+  "any" pass through a bell in any window to current; "current" ignore bells
+  except in current window. This applies only to the bell terminal signal,
+  the status bar always reflects any bells.
+* (nicm) Refresh session command.
+
+12 October 2007
+
+* (nicm) Add a warning if $TMUX exists on new/attach.
+* (nicm) send-prefix command. Bound to C-b by default.
+* (nicm) set status, status-fg, status-bg commands. fg and bg are as a number
+  from 0 to 8 or a string ("red", "blue", etc). status may be 1/0, on/off,
+  yes/no.
+* (nicm) Make status line mark window in yellow on bell.
+
+04 October 2007
+
+* (nicm) -d option to attach to detach all other clients on the same session.
+* (nicm) Partial resizing support. Still buggy. A C-b S and back sometimes fixes
+  it when it goes wonky.
+* (mxey) Added my tmux start script as an example (examples/start-tmux.sh).
+* (mxey) New sessions can now be given a command for their first window.
+* (mxey) Fixed usage statement for new-window.
+* (nicm) attach-session (can't believe I forgot it until now!) and list-windows
+  commands.
+* (nicm) rename-window and select-window commands.
+* (nicm) set-option command (alias set): "tmux set-option prefix ^A".
+* (nicm) Key binding and unbinding is back.
+
+03 October 2007
+
+* (nicm) {new,next,last,previous}-window.
+* (nicm) Rewrite command handling so commands are much more generic and the
+  same commands are used for command line and keys (although most will probably
+  need to check how they are called). Currently incomplete (only new/detach/ls
+  implemented). Change: -s is now passed before command again!
+* (nicm) String number arguments. So you can do: tmux bind ^Q create "blah".
+* (nicm) Key binding. tmux bind key command [argument] and tmux unbind key.
+  Key names are in a table in key-string.c, plus A is A, ^A is ctrl-A.
+  Possible commands are in cmd.c (look at cmd_bind_table).
+* (nicm) Move command parsing into the client. Also rename some messages and
+  tidy up a few bits. Lots more tidying up needed :-/.
+
+02 October 2007
+
+* (nicm) Redraw client status lines on rename.
+* (nicm) Error on ambiguous command.
+
+01 October 2007
+
+* (nicm) Restore window title handling.
+* (nicm) Simple uncustomisable status line with window list.
+
+30 September 2007
+
+* (nicm) Window info command for debugging, C-b I.
+
+29 September 2007
+
+* (nicm) Deleting/inserting lines should follow scrolling region. Fix.
+* (nicm) Allow creation of detached sessions: "tmux new-session -d".
+* (nicm) Permit error messages to be passed back for transient clients like
+  rename. Also make rename -i work.
+* (nicm) Pass through bell in any window to current.
+
+28 September 2007
+
+* (nicm) Major rewrite of input parser:
+	- Lose the old weirdness in favour of a state machine.
+	- Merge in parsing from screen.c.
+	- Split key parsing off into a separate file.
+  This is step one towards hopefully allowing a status line. It requires
+  that we output data as if the terminal had one line less than it really does -
+  a serious problem when it comes to things like scrolling. This change
+  consolidates all the range checking and limiting together which should make
+  it easier.
+* (mxey) Added window renaming, like "tmux rename [-s session] [-i index] name"
+
+27 September 2007
+
+* Split "tmux list" into "tmux list-sessions" (ls) and "list-windows" (lsw).
+* New command session selection:
+	- if name is specified, look for it and use it if it exists, otherwise
+	  error
+	- if no name specified, try the current session from $TMUX
+	- if $TMUX doesn't exist, and there is only one session, use it,
+	  otherwise error
+
+26 September 2007
+
+* Add command aliases, so "ls" is an alias for "list".
+* Rename some commands and alter syntax to take options after a la CVS. Also
+  change some flags. So:
+
+	tmux -s/socket -nabc new
+
+  Becomes:
+
+	tmux -S/socket new -sabc
+
+* Major tidy and split of client/server code.
+
+22 September 2007
+
+* Window list command (C-b W). Started by Maximilian Gass, finished by me.
+
+20 September 2007
+
+* Specify meta via environment variable (META).
+* Record last window and ^L key to switch to it. Largely from Maximilian Gass.
+* Reset ignored signals in child after forkpty, makes ^C work.
+* Wrap on next/previous. From Maximilian Gass.
+
+19 September 2007
+
+* Don't renumber windows on close.
+
+28 August 2007
+
+* Scrolling region (\e[r) support.
+
+27 August 2007
+
+* Change screen.c to work more logically and hopefully fix heap corruption.
+
+09 July 2007
+
+* Initial import to CVS. Basic functions are working, albeit with a couple of
+  showstopper memory bugs and many missing features. Detaching, reattaching,
+  creating new sessions, listing sessions work acceptably for using with shells.
+  Simple curses programs (top, systat, tetris) and more complicated ones (mutt,
+  emacs) that don't require scrolling regions (ESC[r) mostly work fine
+  (including mutt, emacs). No status bar yet and no key remapping or other
+  customisation.