cubicweb #3154558 [security] rdefs using default read permissions: just do nothing [in-progress]

Because:

  • the default rule is (u'managers', u'users', u'guests'), which actually means 'everyone'
  • semantically it parallels what is now done with the entity update rule (https://www.cubicweb.org/patch/2932064)
prioritynormal
typeenhancement
done in<not specified>
load1.000
load left1.000
closed by<not specified>
patch[security] when checking an rdef `read security groups`, do nothing if they are the default [rejected]