Blocked revisions 85916 via svnmerge

........
  r85916 | lars.gustaebel | 2010-10-29 11:08:19 +0200 (Fri, 29 Oct 2010) | 7 lines

  Add read support for all missing variants of the GNU sparse
  extensions. Thus, in addition to GNUTYPE_SPARSE headers, sparse
  information in pax headers created by GNU tar can now be decoded.
  All three formats 0.0, 0.1 and 1.0 are supported.
  On filesystems that support this, holes in files are now restored
  whenever a sparse member is extracted.
........