refactor: rework mime type comparison and clean code rest.py: accept application/* as match for application/json in non /binary_context rest path. allow defining default mime type to return when file/message is missing mime type. Make it a class variable to it can be changed from text/plain to text/markdown or whatever. extract code from determine_output_format() to create create_valid_content_types() method which returns a list of matching mime types for a given type/subtype. Eliminate mostly duplicate return statements by introducing a variable to specify valid mime types in error message. rest_common.py: Fix error messages that now return application/* as valid mime type. CHANGES.txt upgrading.txt rest.txt: top level notes and corrections. Also correct rst syntax on earlier change.

try:
    # Python 3+.
    from xmlrpc import client, server
    # If client.defusedxml == False, client.py will warn that
    # xmlrpc is insecure and defusedxml should be installed.
    client.defusedxml = False
    try:
        from defusedxml import xmlrpc
        xmlrpc.monkey_patch()
        # figure out how to allow user to set xmlrpc.MAX_DATA = bytes
        client.defusedxml = True
    except ImportError:
        # use regular xmlrpc with warnings
        pass

    server.SimpleXMLRPCDispatcher  # noqa: B018
except (ImportError, AttributeError):
    # Python 2.
    import SimpleXMLRPCServer as server
    import xmlrpclib as client  # noqa: F401
    client.defusedxml = False