Make the clean-up process occur much more quickly by turning off the auto-commit option. That also requires adding explicit commit()/rollback() calls. A new api to do a batch delete of items in one transaction was added.
Make the clean-up process occur much more quickly by turning off the auto-commit option. That
also requires adding explicit commit()/rollback() calls. A new api to do a batch delete of items
in one transaction was added.

git-svn-id: 81e381228600e5752b80483efd2b45b26c451ea2@2177 e27351fd-9f3e-4f54-a53b-843176b1656c

trevor/calendarserver,trevor/calendarserver,trevor/calendarserver