py27-html-docs: Update to 2.7.16

Changes:
2.7.16
======
Documentation
-------------
- bpo-35035: Rename documentation for :mod:`email.utils` to
  ``email.utils.rst``.
- bpo-34967: Use app.add_object_type() instead of the deprecated Sphinx
  function app.description_unit()
- bpo-13407: Add a note to :mod:`bz2` and :mod:`tarfile` stating that
  handling of multi-stream bzip2 files is not supported.
- bpo-33503: Fix broken pypi link

(leot)