[issue18799] Resurrect and fix test_404 in Lib/test/test_xmlrpc.py

[Vajrasky Kok]

Change by Vajrasky Kok <sky.kok at speaklikeaking.com>:


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pull_requests: +10435

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue18799>
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