cubicweb #1251878 cubicweb-ctl create crash when instance config dir doesn't exists [validation pending]

People expect this director (/etc/cubicweb.d/, or ~/etc/cubicweb.d) to be created by cubicweb itself.

priorityimportant
typebug
done in3.9.9
load0.250
load left0.000
closed by<not specified>