Update rbmotd for Review Board 4.0
Review Request #11057 — Created June 25, 2020 and submitted — Latest diff uploaded
This change updates the message of the day extension for changes in
Review Board 4.0. This includes moving away from the oldpatterns
method for creating urlpatterns, and updating for API changes in Djblets
config forms. This also modernizes the codebase a bit, adding
unicode_literalsand docstrings.
Activated and configured the motd extension. Verified that everything
worked as expected.