issue2551023: Fix CSRF headers for use with wsgi and cgi. The env variable array used - separators rather than _. Compare: HTTP_X-REQUESTED-WITH to HTTP_X_REQUESTED_WITH. The last is correct. Also fix roundup-server to produce the latter form. (Patch by Cédric Krier)

try:
    # Python 3+.
    from xmlrpc import client, server
    server.SimpleXMLRPCDispatcher
except (ImportError, AttributeError):
    # Python 2.
    import xmlrpclib as client
    import SimpleXMLRPCServer as server