libpng-1.0.47 and libpng-1.2.38 are available

libpng-1.0.47 and libpng-1.2.38 are available from
ftp://ftp.simplesystems.org/pub/png/src/
and from
http://libpng.sourceforge.net/index.html

There are no changes from libpng-1.2.38rc03.
Since libpng-1.2.37, the license declarations were changed
to mention the "libpng license".  The configuration files were
rebuilt with autoconf-2.63.  Some "#ifdef's"
were reorganized to separate unknown chunk support from
png_set_keep_unknown_chunks() support, because the
latter is also useful for ignoring known but unused chunks.

Glenn

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