Fixes for memory leaks reported by Lu Ming Yin, fixes from Howard Chu.

Add a missing error message which causes an invalid layout name to crash.

Better error reporting when applying custom layouts.

Add split-window -Z to start the pane zoomed, GitHub issue 2591.

Make a best effort to set xpixel and ypixel for each pane and add
formats for them.

Do not crash trying to fix layout size if only one cell, from Azat Khuzhin.

Some old tmux versions can sometimes generate layout strings which have
the incorrect size for the top cell. Previously tmux didn't care but now
that panes can be partly hidden, the size matters and

Some old tmux versions can sometimes generate layout strings which have
the incorrect size for the top cell. Previously tmux didn't care but now
that panes can be partly hidden, the size matters and is checked more
strictly. So add some code to fix up the most common problem and a
sanity check to reject layouts with any other size problems. Reported by
Aleksandrs Ledovskis in GitHub issue 1930.

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Do not lazily use BUFSIZ for "I don't care what size" when building
strings because it is only guaranteed to be 256 bytes and even the
default 1024 is not always enough. Reported by Gregory Pakosz.

Make layout_fix_offsets take a window like layout_fix_panes.

Use the right format modifier when comparing, and remove a couple of
unused variables.

Do not always resize the window back to its original size after applying
a layout, let the normal window resize process do it. This means windows
are not resized at all if window-size is manual, and

Do not always resize the window back to its original size after applying
a layout, let the normal window resize process do it. This means windows
are not resized at all if window-size is manual, and are not resized
multiple times if later attached to a different size terminal.

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Support for windows larger than visible on the attached client. This has
been a limitation for a long time.

There are two new options, window-size and default-size, and a new
command, resize-window.

Support for windows larger than visible on the attached client. This has
been a limitation for a long time.

There are 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. The default is
currently largest but this may change. 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). The
offset of the visible portion of the window is shown in status-right.

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, and "setw -u window-size" to revert to automatic sizing..

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 much higher memory use if making a window excessively
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.

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Use the notify name string instead of going via an enum and change
existing hooks to use notifys instead.

Fix minimum size when pane status line is enabled, reported by Y Petremann.

Wrap some long lines and apply some static.

I no longer use my SourceForge address so replace it.

Always format real layout even when zoomed.

Fix handling of short (< 4 character) checksums and a bug with parsing
old-style custom layouts. Based on fix from Chris Johnsen.

Add notify hooks for various events, the functions are currently empty
stubs but will be filled in for control mode later. From George Nachman.

Check for the right return value from sscanf.

Add pane id to each pane in layout description (while still accepting
the old form). Based on diff from George Nachman.

Get rid of the layout string code which tries to walk through the layout
hierarchy and instead just look at what panes are actually in the window.

Custom layouts. list-windows command displays the layout as a string (such as
"bb62,159x48,0,0{79x48,0,0,79x48,80,0}") and it can be applied to another
window (with the same number of panes or fewer)

Custom layouts. list-windows command displays the layout as a string (such as
"bb62,159x48,0,0{79x48,0,0,79x48,80,0}") and it can be applied to another
window (with the same number of panes or fewer) using select-layout.

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