Fix handling of non-latin credentials in HTTPDigestAuth #6837
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Fixes #6102
Update
HTTPDigestAuthto handle non-latin credentials correctly._basic_auth_strinsrc/requests/auth.pyto encodeusernameandpasswordusingutf-8instead oflatin1.build_digest_headerinsrc/requests/auth.pyto correctly format the string for the header with non-latin characters.tests/test_requests.pyto verify correct handling of non-latin credentials inHTTPDigestAuth.