Berker: I had some review comments pending on the docs, but reitveld isn't letting me publish them for some reason (it says the patch set doesn't exist).

The comments are: the method docs should probably say "``False`` or ``0`` (the default)" (and all the numbers should be marked up as code), and the versionchanged I think should say that the option was changed to a multilevel value.

Otherwise the patch looks good to me, too.