Log Message:
misc/tmux: minor update to 3.2a.

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.