Merge "Sysconfig define a whitelist of permitted backup transports" into nyc-dev am: 11d9586117
am: b7ae368079

* commit 'b7ae3680798aa5dce807015a763a0d017ce7e0c1':
  Sysconfig define a whitelist of permitted backup transports

Change-Id: Idcc14b5f890497a6bf59755d91f66c27f5db3451