Updated: zstd-1.4.9-1 and development headers / libraries

Updated: zstd-1.4.9-1 and development headers / libraries

[Achim Gratz]

This release updates Zstandard to the latest upstream version, which is
a maintenance release with performance improvements and bugfixes.


Zstandard, or zstd as short version, is a fast lossless compression
algorithm, targeting real-time compression scenarios at zlib-level and
better compression ratios.

http://www.zstd.net/


Besides a standalone compression tool, development headers and a library
with comprehensive API are available both for Cygwin native applications
and cross-compilation toolchains in the following sub-packages:

libzstd-devel-1.4.9-1
libzstd1-1.4.9-1
mingw64-i686-zstd-1.4.9-1
mingw64-x86_64-zstd-1.4.9-1


Notes
-----

This version is compiled with support for GZip, LZ4 and Xz compression.
Support for legacy formats from versions before 1.0 has been removed.

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