We decided that better name for "scope" will be "access". This change
refactors cmd part of code but don't touch libuplink. For backward
compatibility old configs with "scope" field will be loaded without any
issue. Old flag "scope" won't be supported directly from command line.
https://storjlabs.atlassian.net/browse/V3-3488
Change-Id: I349d6971c798380d147937c91e887edb5e9ae4aa
Remove direct dependency on uplink.RSConfig, this simplifies
moving the config file without introducing weird dependencies.
Change-Id: I7fd2a145401e0205d7047631df9d2810241efeec