v2.2.1

• #65: Support for Cheroot server, which is the standalone WSGI server of CherryPy
  since version 9.0.
  --server=cheroot is the default now.
• New option --ssl-adapter, used by 'cheroot' server if SSL certificates are
  configured. Defaults to 'builtin'.
  
  Set to 'pyopenssl' to use an existing OpenSSL nstallation.
  (Note: Currently broken as of Cheroot 5.1, see cherrypy/cheroot#6)
• Deprecate cherrypy.wsgiserver.
  
  --server=cherrypy was renamed to --cherrypy-wsgiserver
• #64: Fix LOCK without owner
• #65: Add lxml to MSI installer
• Release as Wheel