[DBD-SQLite] Removing the on-by-default referential integrity.

[Darren Duncan]

Adam Kennedy wrote on Nov 3:
> Righto, so I'm going to roll an official "release candidate" dev
> version now, and we code freeze at this point (just docs and test
> tweaks allowed between now and final).
> 
> I'll let the last dev release cook for 3 or 4 days, then do the prod one.

Adam, when were you planning to do this?  The Oct 28 dev release is still the 
latest. -- Darren Duncan