Move storageconfig fetch/parse code to libsetup.
Create "getstorageconfig" call in libsetup, following the tradition with other tmcc information fetching routines. It's guts were yanked out of rc.storage. Outside of calling the moved code from libsetup, rc.storage was also changed slightly to store the returned information using "Storable" since it's now dealing with an array of hashes instead of raw lines of output from tmcc.
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