MongoEngine/mongoengine — pull request #590 by brianhelba (2014-03-02 23:38:05+00:00)
Title: Add authentication_source option to register_connection (#573) (#580)

Since v2.5, PyMongo has supported a "source" option, to specify a
particular database to authenticate against. This adds support for that
option, in the form of a "authentication_source" option to
register_connection.