style
Data sources may be enclosed in tables, so must respect the "owner"
setting.
Add WT_CURSTD_BULK, a bulk-load configuration flag at the WT_CURSOR level:
__curtable_open_indices wants to return an error if bulk load is configured
when opening indices.  Previously it assumed the primary cursor was a btree
cursor and looked inside it; obviously, that doesn't work when the underlying
cursor is of a different type.