Perkeep config experiementation

gistfile1.txt

After:
   "/bs/": {
      "handler": "storage-proxycache",
      "handlerArgs": {
            "origin": "/sto-s3/",
	    "cache": "/cache/"
      }
    },

Before:
    "/bs/": {
      "handler": "storage-blobpacked",
      "handlerArgs": {
        "largeBlobs": "/bs-packed/",
        "metaIndex": {
          "file": "/home/lancew/var/perkeep/blobs/packed/packindex.leveldb",
          "type": "leveldb"
        },
        "smallBlobs": "/bs-loose/"
      }
    },
    "/cache/": {
      "handler": "storage-filesystem",
      "handlerArgs": {
        "path": "/home/lancew/var/perkeep/blobs/cache"
      }
    },
    
    From proxycache docs:
          "/cache/": {
          "handler": "storage-proxycache",
          "handlerArgs": {
		  "origin": "/cloud-blobs/",
		  "cache": "/local-ssd/",
		  "maxCacheBytes": 536870912
          }
      },