-Although sparse file attributes will be applied, the full data will be extracted
-to each sparse file, so extracted "sparse" files may not actually contain any
-sparse regions.
+wimlib v1.6.3 and later: Sparse file attributes will not be extracted (same
+behavior as ImageX/DISM/WIMGAPI). wimlib v1.6.2 and earlier: Although sparse
+file attributes will be applied, the full data will be extracted to each sparse
+file, so extracted "sparse" files may not actually contain any sparse regions.