On Thu, Jun 02, 2016 at 11:07:15AM +0100, Robin Kjeld wrote:
Jun 02 07:24:40.000 [warn] Received http status code 504 ("Gateway Time- out") from server '154.35.175.225:80'
Right, that is the directory authority 'faravahar' being broken again. It does this sometimes, unfortunately causing scary-sounding warnings in relay log messages. It's nothing to worry about (so long as enough other dir auths aren't broken).
--Roger