gzip是GNU zip的缩写，它是一个GNU自由软件的文件压缩程序，也经常用来表示gzip这种文件格式。
软件的作者是Jean-loup Gailly和Mark Adler。1992年10月31日第一次公开发布，版本号是0.1。下载：
  ftp://ftp.gnu.org/gnu/gzip/gzip-1.4.tar.gz   (888KB)
  ftp://ftp.gnu.org/gnu/gzip/gzip-1.4.tar.xz   (600KB)

ChangeLog: http://git.sv.gnu.org/gitweb/?p=gzip.git;a=shortlog;h=v1.4

** Bug fixes

  gzip -d could segfault and/or clobber the stack, possibly leading to
  arbitrary code execution.  This affects x86_64 but not 32-bit systems.
  This fixes CVE-2010-0001.
  For more details, see http://bugzilla.redhat.com/554418

  gzip -d would fail with a CRC error for some valid inputs.
  So far, the only valid input known to exhibit this failure was
  compressed "from FAT filesystem (MS-DOS, OS/2, NT)".  In addition,
  to trigger the failure, your memcpy implementation must copy in
  the "reverse" ord