Wesalius added a comment.
After updating today to
Pywikibot: [https] r-pywikibot-core.git (e9db1f9, g5334, 2015/04/11, 00:17:48, o k) Release version: 2.0b3 httplib2 version: 0.9
I still get the WARNING message, but the script works as should, so it is SOLVED. Thank you.
TASK DETAIL https://phabricator.wikimedia.org/T95671
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To: XZise, Wesalius Cc: gerritbot, XZise, Wesalius, Aklapper, jayvdb, pywikipedia-bugs