png_convert_to_rfc1123 4187 contrib/libtests/pngvalid.c          result = png_convert_to_rfc1123(pp, &pt);
png_convert_to_rfc1123 1165 png.h          PNG_EXPORTA(23, png_const_charp, png_convert_to_rfc1123, (png_structrp png_ptr,