[sql generation] fix missing join with outer joins w/ rhs invariant variable...
... where the principal where not the processed relation.
This led to major refactoring in outer join handling, which is now much
clearer and powerful.
Closes #1579228
#! /bin/sh -e
if [ -x "/etc/init.d/cubicweb-ctl" ]; then
invoke-rc.d cubicweb-ctl restart || true
fi
#DEBHELPER#
exit 0