update CHANGES

Author: tony

CHANGES

@@ -4,6 +4,9 @@ Changelog
 
 Here you can find the recent changes to libtmux
 
+- :support:`-` Don't add -x/-y in tmux >= 2.6 if running tmuxp from inside
+  client.
+
 - :release:`0.7.6 <2017-11-09>`
 - :feature:`-` Allow ``Window.select_layout`` with no args
 - :bug:`-` Fix test where ``bell-`` was no longer ambiguous as of tmux 2.6