In many ways, this is a bug fix and not a new feature.  os.islink is
already in the ntpath module, but simply doesn't perform its intended
purpose. Similarly, os.symlink exists and is defined for unix platforms,
but is just absent on the Windows platform.  In other words, this patch
doesn't implement new features, but simply expands the platform support
for existing features.  Therefore, I believe this is a strong candidate
for a 3.1.1 target.

That said, if the maintainers would prefer to defer this capability to
3.2, then I would like to move forward with that effort.

Whatever the recommended approach, this effort is ready to move onto the
next step.