[querier] Expand 'rdef' argument in InsertPlan.add_relation_def()
Expand the 'rdef' tuple to improve readability. The 'rtype' value is not
used at the moment, but will in the next changeset.
version=3
opts=uversionmangle=s/(rc|a|b|c)/~$1/ \
https://pypi.debian.net/cubicweb/cubicweb-(.+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))