Review Board had some changes that broke Review Bot in a few ways, some

subtle.
First, there are the usual updates for import locations. Django changed

import locations for the urlpattern-related objects, which are now fixed

here.
Then there are more complicated fixes.
Review Bot was unable to log in to Review Board with the provided

session key. That's because Django now checks that the stored auth

backend for a session is in our list of backends. ModelBackend isn't, so

all logins failed. Instead of storing ModelBackend, we now store our

StandardAuthBackend.
After that, everything worked except for publishing. The API resource

handling publishing of reviews was trying to use positional arguments

when fetching an object, but it needed to use keyword arguments. In

previous versions, positional arguments were apparently working, but

this was never intended to be supported.
There's also an update to use our new setup() function instead of the

one that comes with setuptools.
This, along with some changes made to Djblets and Review Board, make

Review Bot functional again.

Posted changes for review, and watched as Review Bot posted some reviews

for the configured tools.