Add note about reload hook

herbstluftwm/.config/herbstluftwm/autostart

@@ -25,6 +25,10 @@ function lock-tag-to-monitor() {
                  , set_attr tags.by-name."$1".my-monitor "$2"
 }
 
+## Reload hook:
+
+# According to the herbstluftwm man page this hook is emitted so that
+# daemons will know to quit and it should be emitted first thing.
 hc emit_hook reload
 
 xsetroot -solid '#5A8E3A'