Merge branch 'master' of git://ctrl.tukaani.org/xz

Merge branch 'master' of git://ctrl.tukaani.org/xz

Sync with upstream.  Upstream revamped the Index handling code,
so bump the soname while we are at it.  The API changes are
described in detail in the Debian changelog.

* 'master' of git://ctrl.tukaani.org/xz:
  Updated windows/Makefile.
  Update the xz man page to match the previous two commits.
  Don't read compressed data from a terminal or write it
  Don't compress or decompress special files unless writing
  Updated THANKS.
  Add IRIX-specific code to tuklib_physmem and tuklib_cpucores.
  Fix _memconfig() functions.
  Revised the Index handling code.
  Remove c-format tag in cs.po.
  Add missing lzma_nothrow in filter.h.
  Remove redefinition of _(msgid) macro from lzmainfo.c.
  update po/.gitignore
  Always rely on GCC's auto-import on Windows.
  Fix file_io.c on DOS-like systems.
  Add Czech translation.
  Add a note for translators to add a bug reporting address
  Prevent xgettext from taking one regular string as a C format string.
  Remove duplicate code in io_open_dest().