* Fix a toolbar crash when loading the page and there aren't
any visible requests yet.
* Fix a concern where the toolbar may access sensitive request
attributes like ``request.authenticated_userid`` at times
outside of the supported request lifecycle.
* Avoid triggering DeprecationWarnings when tracking values for
deprecated attributes in Pyramid like ``effective_principals``.
OBS-URL: https://build.opensuse.org/package/show/devel:languages:python/python-pyramid-debugtoolbar?expand=0&rev=16