mongoid/mongoid — pull request #2139 by bdmac (2012-06-26 15:53:06+00:00)
Title: Backport identity map disabling from 3.0 (#1459) to 2.4.0 stable branch

I wanted to use the new 3.0 identity map disabling feature Durran added into 3.0 in my current app running against 2.x. I just cherry picked his commit back to the 2.4.0 stable branch, resolved a minor conflict, and ran the test suite to make sure it worked. All tests green.