Fixed -- Clarified MySQL/MariaDB support of QuerySet.select_for_update() options.
Thanks Par Andersson for reporting the issue.
@@ -1706,8 +1706,9 @@ them::
<QuerySet [<Person: ...)>, ...]>
Currently, the ``postgresql``, ``oracle``, and ``mysql`` database
-backends support ``select_for_update()``. However, MySQL doesn't support the
-``nowait``, ``skip_locked``, and ``of`` arguments.
+backends support ``select_for_update()``. However, MariaDB 10.3+ supports only
+the ``nowait`` argument and MySQL 8.0.1+ supports the ``nowait`` and
+``skip_locked`` arguments. MySQL and MariaDB don't support the ``of`` argument.
Passing ``nowait=True``, ``skip_locked=True``, or ``of`` to
``select_for_update()`` using database backends that do not support these
