4.2 28 FEB 2011 XZ compression, and compression options support
1. Filesystem improvements:
1.1 Added XZ compression
1.2 Added compression options support
2. Miscellaneous improvements/bug fixes
1.1 Add missing NO_XATTR filesystem flag to indicate no-xattrs
option was specified and no xattrs should be stored when
1.2 Add suppport in Unquashfs -stat option for displaying
1.3 Remove checkdata entry from Unsquashfs -stat option if a 4.0
filesystem - checkdata is no longer supported.
1.4 Fix appending bug when appending to an empty filesystem - this
would be incorrectly treated as an error.
1.5 Use glibc sys/xattr.h include rather than using attr/xattr.h
which isn't present by default on some distributions.
1.6 Unsquashfs, fix block calculation error with regular files when
file size is between 2^32-block_size+1 and 2^32-1.
1.7 Unsquashfs, fix sparse file writing when holes are larger than
1.8 Add external CFLAGS and LDFLAGS support to Makefile, and allow
build options to be specified on command line. Also don't
over-write passed in CFLAGS definition.