Move to URL based syntax formatting. (#3092)

For command line arguments we are currently following

- <node-1>:/path ... <node-n>:/path

This patch changes this to

- http://<node-1>/path ... http://<node-n>/path

cmd/erasure-readfile_test.go

@@ -222,7 +222,7 @@ func TestErasureReadUtils(t *testing.T) {
 	if err != nil {
 		t.Fatal(err)
 	}
-	endpoints, err := parseStorageEndPoints(disks, 0)
+	endpoints, err := parseStorageEndpoints(disks)
 	if err != nil {
 		t.Fatal(err)
 	}