I3 Add xkill.

i3/config

@@ -34,8 +34,9 @@ floating_modifier $mod
 bindsym $mod+Return exec i3-sensible-terminal
 
 # kill focused window
-bindsym $mod+Shift+q kill
 bindsym $mod+q kill
+bindsym $mod+Shift+q --release exec xkill
+bindsym $mod+Ctrl+q --release exec killall xkill
 
 # start dmenu (a program launcher)
 bindsym $mod+d exec dmenu_run