Rebuilt the configure scripts.

'off'.  Previously the ARM NEON specific files were still built if the option
was switched 'off' as opposed to being explicitly disabled.

switched 'off'.  Previously the ARM NEON specific files were still built
if the option was switched 'off' as opposed to being explicitly disabled.

can handle.

Reverted previous attempt to allow gAMA and sRGB non-support with the
simplified API.

png_image_write_main() in pngwrite.c (bug report from Yuriy Levchenko).

chunk length written by libpng-1.6.0 and 1.6.1.

    (Flavio Medeiros).

png_set of the transform function, but that doesn't matter unless the
transform function changes the rowbuf size, and that is only valid if
transform_info is called.

warning would be produced if the end of the deflate stream wasn't read
in the last row.  The warning is harmless.

handling.