Log Message:
py36-html-docs: Update lang/py36-html-docs to 3.6.6

Changes:
3.6.6
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Documentation
 - bpo-33503: Fix broken pypi link
 - bpo-33421: Add missing documentation for typing.AsyncContextManager.
 - bpo-33378: Add Korean language switcher for https://docs.python.org/3/
 - bpo-33276: Clarify that the __path__ attribute on modules cannot be just
              any value.
 - bpo-33201: Modernize documentation for writing C extension types.
 - bpo-33195: Deprecate Py_UNICODE usage in c-api/arg document.
              Py_UNICODE related APIs are deprecated since Python 3.3, but it
              is missed in the document.
 - bpo-33126: Document PyBuffer_ToContiguous().
 - bpo-27212: Modify documentation for the islice() recipe to consume initial
              values up to the start index.
 - bpo-28247: Update zipapp documentation to describe how to make standalone
              applications.
 - bpo-18802: Documentation changes for ipaddress. Patch by Jon Foster and
              Berker Peksag.
 - bpo-27428: Update documentation to clarify that WindowsRegistryFinder
              implements MetaPathFinder. (Patch by Himanshu Lakhara)
 - bpo-8243: Add a note about curses.addch and curses.addstr exception
             behavior when writing outside a window, or pad.
 - bpo-31432: Clarify meaning of CERT_NONE, CERT_OPTIONAL, and CERT_REQUIRED
              flags for ssl.SSLContext.verify_mode.