Update CHANGES.

CHANGES

@@ -1,6 +1,15 @@
 CHANGES FROM 3.2 TO 3.2a
 
-XXX
+* 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