python 3.11 test failure in test_family_to_string

[nirik]

Fedora rawhide has switched to python 3.11 and sshuttle fails to build due to a test:

platform linux -- Python 3.11.0b5, pytest-7.1.2, pluggy-1.0.0
rootdir: /builddir/build/BUILD/sshuttle-1.1.0, configfile: setup.cfg
plugins: cov-3.0.0, mock-3.8.2
collected 69 items
tests/client/test_firewall.py ...                                        [  4%]
tests/client/test_helpers.py ...........F                                [ 21%]
tests/client/test_methods_nat.py .........                               [ 34%]
tests/client/test_methods_pf.py .............                            [ 53%]
tests/client/test_methods_tproxy.py .........                            [ 66%]
tests/client/test_options.py .........                                   [ 79%]
tests/client/test_sdnotify.py ......                                     [ 88%]
tests/server/test_server.py .....                                        [ 95%]
tests/ssh/test_parse_hostport.py ...                                     [100%]
=================================== FAILURES ===================================
____________________________ test_family_to_string _____________________________
    def test_family_to_string():
        assert sshuttle.helpers.family_to_string(AF_INET) == "AF_INET"
        assert sshuttle.helpers.family_to_string(AF_INET6) == "AF_INET6"
        expected = 'AddressFamily.AF_UNIX'
>       assert sshuttle.helpers.family_to_string(socket.AF_UNIX) == expected
E       AssertionError: assert '1' == 'AddressFamily.AF_UNIX'
E         - AddressFamily.AF_UNIX
E         + 1
tests/client/test_helpers.py:196: AssertionError

Downstream bug: https://bugzilla.redhat.com/show_bug.cgi?id=2099176

Also, they almost landed this change in python 3.10:
https://bugzilla.stage.redhat.com/show_bug.cgi?id=1949447

Python enum changes:
https://docs.python.org/3.10/whatsnew/changelog.html#python-3-10-0-alpha-7

[brianmay]

Would be good to get a link to the change that broke this. Guessing maybe this did it:

bpo-40066: Enum: adjust repr() to show only enum and member name (not value, nor angle brackets) and str() to show only member name. Update and improve documentation to match.

sshuttle uses the str() method. https://github.com/sshuttle/sshuttle/blob/master/sshuttle/helpers.py#L157

I am assuming this is a enum value, not really sure.

Regardless, I don't think ssshuttle really needs AF_UNIX to work...