AFAICT, the taglist extension is only used to generate some of the "See Also"
links on pages, like this one:
If that's all it's used for, let's remove it. From some quick searching I
did not see a quick replacement for taglists. But we could do something simpler.
Replace the lists of links with an include file:
.. taglist:: See Also:
.. include:: includes/seealso/authmechanism.txt
And that file can just have a plain old list.