Log Message:
Update to 4.42:

Version 4.42
============
  - From Windows version of 7-zip 4.42 :
    - Some bugs were fixed

  - patch #1473746 - gzip-like CLI wrapper (for 7z)
    see the directory "contrib/gzip-like_CLI_wrapper_for_7z".

  - patch #471478 - Support for OPTFLAGS
    This patch allows to use system specific opt flags.
    example : make OPTFLAGS="-O2 -march=athlon-xp"

Version 4.41
============
  - From Windows version of 7-zip 4.41 :
    - Some bugs were fixed

Version 4.40
============

  - From Windows version of 7-zip 4.40 :
    - 7-Zip now can unpack some installers created by NSIS
    - Some bugs were fixed

  - format LZH/LHA : fixed directory display during listing or extracting
    (a directory does not end with the path separator)

  - patch #1470817 - Handle 7zr in install.sh

  - code cleanup