[multi-sources-removal] drop source location search on glob_*[entity|relation] methods
source is now always the system source
Related to #2919300
[jcr: fix wrong rebase in symmetric relation removal]
.. -*- coding: utf-8 -*-
Server Architecture
-------------------
.. image:: images/server-class-diagram.png
`Diagramme ArgoUML`_
[FIXME]
Make a downloadable source of zargo file.
.. _`Diagramme ArgoUML`: cubicweb.zargo