Do not consider a selection present if it is empty, from Michael Grant
(GitHub issue 3869). Also a typo fix from GitHub issue 3877.

Always initialize screen mode, GitHub issue 3750 from Ding Fei.

Fix a couple of mouse mode flag names.

When exiting alternate screen, there is no need to reflow when going
back to old size since the contents will be overwritten. GitHub issue
3510.

Add support for OSC 8 hyperlinks (a VTE extension now supported by other
terminals such as iTerm2). Originally written by me then extended and
completed by first Will Noble and later Jeff Chiang. Git

Add support for OSC 8 hyperlinks (a VTE extension now supported by other
terminals such as iTerm2). Originally written by me then extended and
completed by first Will Noble and later Jeff Chiang. GitHub issues 911,
2621, 2890, 3240.

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Spacing/style nits.

Preserve CRLF flag when respawning.

Add a cursor-style option, from Alexis Hildebrandt in GitHub issue 2960.

Add a cursor-colour option, from Alexis Hildebrandt in GitHub issue
2959.

Separate "very visible" flag from blinking flag, it should not affect
DECSCUSR. GitHub issue 2891.

Fix parsing of aliases again (GitHub issue 2842), also make argument
parsing a bit simpler and fix the names of some client flags.

Remove stray spaces after function names.

Improve logging of screen mode changes.

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. GitHub issue 2682.

Add an "always" value to the extended-keys option to always forward
these keys to applications inside tmux.

Fix so tmux correctly sends the cvvis (cursor very visible) capability
rather than sending it and then immediately undoing it with cnorm. Also
turn it off when the cursor shape is changed like xterm.

Always resize the original screen before copying when exiting the
alternate screen, GitHub issue 2536.

Do not leak path when freeing screen, from Sergey Nizovtsev.

Store and restore cursor position when copy mode is resized, from
Anindya Mukherjee.

Update the cursor position when deleting lines from screens without
history, GitHub issue 2173.

A resize can realloc so cannot cache the value of the list pointer.

There is no point in keeping a bunch of different text buffers for each
line when writing, we only need one as big as the line width - there
can't be any more text than that since newer will overwrit

There is no point in keeping a bunch of different text buffers for each
line when writing, we only need one as big as the line width - there
can't be any more text than that since newer will overwrite older.

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Make sure the cursor position is still on screen after we have trimmed
empty lines. Also improve some log messages.

Instead of fixing with the cursor position when the copied screen is
created, resize it and let the resize/reflow code fix it up and return
it. Solves various problems with cursor position and resizi

Instead of fixing with the cursor position when the copied screen is
created, resize it and let the resize/reflow code fix it up and return
it. Solves various problems with cursor position and resizing when in
copy mode. With Anindya Mukherjee.

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Use grid_empty_line rather than memset when adding new lines on resize.
Also remove some old test code.