Which is the official web site home page of libpng?

[harkue]

which is the official web site home page of libpng? A: http://www.libpng.org/ B: https://libpng.sf.net (also is https://libpng.sourceforge.io/)

[harkue]

As mentioned here :

The home site for development versions (i.e., may be buggy or subject to change or include experimental features) is https://libpng.sourceforge.io/

So it seems http://www.libpng.org/ is more official.