Update 8.3-to-8.4.md

doc/update/8.3-to-8.4.md

@@ -98,6 +98,10 @@ We updated the init script for GitLab in order to set a specific PATH for gitlab
 cd /home/git/gitlab
 sudo cp lib/support/init.d/gitlab /etc/init.d/gitlab
 ```
+    
+For Ubuntu 16.04.1 LTS:
+
+    sudo systemctl daemon-reload
 
 ### 8. Start application