Do not rename a buffer to itself, GitHub issue 4181.

Remove old buffer when renaming rather than complaining, GitHub issue
3467 from Jean-Philippe Paradis.

Add paste-buffer-deleted notification and fix name of paste-buffer-changed.

Notify when a paste buffer is deleted, GitHub issue 3302 from George
Nachman.

When picking a buffer because one isn't specified by the user, ignore
named buffers. GitHub issue 3212 from David le Blanc.

Use VIS_CSTYLE for paste buffers also.

Add 'e' key in buffer mode to open the buffer in an editor.

Add an argument to copy commands to set the prefix for the buffer name,
allows buffers for different sessions to be named separately.

Shorten a long line, and don't leak buffer in paste_add if size is zero.

Unused variable and missing time.h.

Some other stuff that can be local to one file.

Some more static.

Keep buffer creation time and add accessors for it and the order number.

I no longer use my SourceForge address so replace it.

Nuke the utf8 and status-utf8 options and make tmux only a UTF-8
terminal. We still support non-UTF-8 terminals outside tmux, but inside
it is always UTF-8 (as when the utf8 and status-utf8 options w

Nuke the utf8 and status-utf8 options and make tmux only a UTF-8
terminal. We still support non-UTF-8 terminals outside tmux, but inside
it is always UTF-8 (as when the utf8 and status-utf8 options were on).

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Move struct options into options.c.

Remove some extra blank lines.

Merge delete-buffer into cmd-set-buffer.c and change the paste buffer
API so it has one paste_free() rather than free_top and free_name
(everywhere that uses it already has the right pointer).

paste_send_pane can be merged into cmd-paste-buffer.c now.

Move struct paste_buffer out of tmux.h.

When replacing, don't free the old paste until after the new one's name
has been copied. Fixes a use-after-free in window-copy.c. Bug reported
by J Raynor (who also provided a different fix).

Tidy up mode-mouse check.

Add xreallocarray and remove nmemb argument from xrealloc.

Use xrealloc(NULL, n, m) instead of xmalloc(n * m) to get overflow
check.

Various minor style and spacing nits.