- the 'expire' option on query.update() has been renamed to 'fetch', thus matching

- the 'expire' option on query.update() has been renamed to 'fetch', thus matching
that of query.delete()
- query.update() and query.delete() both default to 'evaluate' for the synchronize
strategy.
- the 'synchronize' strategy for update() and delete() raises an error on failure.
There is no implicit fallback onto "fetch".   Failure of evaluation is based
on the structure of criteria, so success/failure is deterministic based on
code structure.