sub-selects in the selectors list (correlated subqueries)
- Fix inconsistency between $rs->next with and without HRI when all
the "root" columns are in fact injected from the right rs side
+ - Fix the join optimizer to correctly preserve the non-multi path to
+ a multi relationship ( x -> might_have y -> has_many z )
* Misc
- Rewire all warnings to a new Carp-like implementation internal