[server] Drop condition on "3.10" migration in repo.init_sources_from_database()
We'll duplicate the code of this method in forthcoming changeset so clean it
up a bit of old stuff.
missing-dep-for-interpreter make => make | build-essential | dpkg-dev (usr/*/cubicweb/skeleton/debian/rules)
embedded-javascript-library usr/share/cubicweb/cubes/shared/data/jquery.js