* Merged in lp:~marix/duplicity/add-azure-arguments - Using the Azure backend to store large amounts of data we found that performance is sub-optimal. The changes on this branch add command line parameters to fine-tune some parameters of the Azure storage library, allowing to push write performance towards Azure above 1 Gb/s for large back-ups. If a user does not provide the parameters the defaults of the Azure storage library will continue to be used.