About These libpng Distributions
        
        These two files contain the source and supporting files with LF line
        endings (for Unix/Linux) with the "configure" script. Both  have 
        identical content.
        
           libpng-<version>.tar.xz (LZMA-compressed, recommended)
           libpng-<version>.tar.gz
        
        These two files contain the source and supporting files with CRLF line
        endings (for Windows), without the "configure" script.  Both have
        identical content.
        
           lp<version>.7z (LZMA-compressed, recommended)
           lp<version>.zip
        
        Problems with downloading or decompressing these files can be
        reported to png-mng-implement at lists.sourceforge.net or to
        glennrp at users.sourceforge.net