- version update to 1.6.44:
  * Hardened calculations in chroma handling to prevent overflows, and
    relaxed a constraint in cHRM validation to accomodate the standard
    ACES AP1 set of color primaries.
    (Contributed by John Bowler)
  * Removed the ASM implementation of ARM Neon optimizations and updated
    the build accordingly. Only the remaining C implementation shall be
    used from now on, thus ensuring the support of the PAC/BTI security
    features on ARM64.
    (Contributed by Ross Burton and John Bowler)
  * Fixed the pickup of the PNG_HARDWARE_OPTIMIZATIONS option in the
    CMake build on FreeBSD/amd64. This is an important performance fix
    on this platform.
  * Applied various fixes and improvements to the CMake build.
    (Contributed by Eric Riff, Benjamin Buch and Erik Scholz)
  * Added fuzzing targets for the simplified read API.
    (Contributed by Mikhail Khachayants)
  * Fixed a build error involving pngtest.c under a custom config.
    This was a regression introduced in a code cleanup in libpng-1.6.43.
    (Contributed by Ben Wagner)
  * Fixed and improved the config files for AppVeyor CI and Travis CI.
- Drop upstream patch:
  * 563.patch (forwarded request 1219518 from Guillaume_G)

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