From bbe57cbf90d18b9622994822c9c914a91e558b83 Mon Sep 17 00:00:00 2001
From: Will Thames <will@thames.id.au>
Date: Fri, 25 May 2018 13:22:33 +1000
Subject: [PATCH] Default rsync_opts to empty list (#38374)

Otherwise python fails when it tries to iterate over `None`.