Update 8.5-to-8.6.md

doc/update/8.5-to-8.6.md

@@ -138,6 +138,10 @@ via [/etc/default/gitlab].
 Ensure you're still up-to-date with the latest init script changes:
 
     sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
+    
+For Ubuntu 16.04.1 LTS:
+
+    sudo systemctl daemon-reload
 
 ### 9. Start application