pngcheck-src: PNG file format checker (source)

    2021-04-14 09:20       30254 pngcheck-3.0.2-1-cygwin.patch
    2021-04-14 09:20         238 pngcheck-3.0.2-1-cygwin.patch.sig
    2021-04-14 09:20      337959 pngcheck-3.0.2-1.sh
    2021-04-14 09:20         228 pngcheck-3.0.2-1.sh.sig
    2021-04-14 09:20       63202 pngcheck-3.0.2.tar.gz