We use the postreview extension with Mercurial to post code reviews to reviewboard. The Mercurial docs point to a repository on Bitbucket. Bitbucket has deprecated and deleted all Mercurial repositories as of late August, 2020.
Is there a new official home for the postreview extension from the original maintainers?
The archive for the repository for the Reviewboard from the original authors is located here:
https://bitbucket-archive.softwareheritage.org/projects/cc/ccaughie/hgreviewboard.html