XZ Utils 5.2.3 is available at <http://tukaani.org/xz/>. Here is an 
extract from the NEWS file:

  * xz:

      - Always close a file before trying to delete it to avoid
        problems on some operating system and file system combinations.

      - Fixed copying of file timestamps on Windows.

      - Added experimental (disabled by default) sandbox support using
        Capsicum (FreeBSD >= 10). See --enable-sandbox in INSTALL.

  * C99/C11 conformance fixes to liblzma. The issues affected at least
    some builds using link-time optimizations.

  * Fixed bugs in the rarely-used function lzma_index_dup().

  * Use of external SHA-256 code is now disabled by default.
    It can still be enabled by passing --enable-external-sha256
    to configure. The reasons to disable it by default (see INSTALL
    for more details):

      - Some OS-specific SHA-256 implementations conflict with
        OpenSSL and cause problems in programs that link against both
        liblzma and libcrypto. At least FreeBSD 10 and MINIX 3.3.0
        are affected.

      - The internal SHA-256 is faster than the SHA-256 code in
        some operating systems.

  * Changed CPU core count detection to use sched_getaffinity() on
    GNU/Linux and GNU/kFreeBSD.

  * Fixes to the build-system and xz to make xz buildable even when
    encoders, decoders, or threading have been disabled from libilzma
    using configure options. These fixes added two new #defines to
    config.h: HAVE_ENCODERS and HAVE_DECODERS.

-- 
Lasse Collin  |  IRC: Larhzu @ IRCnet & Freenode

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