[issue23630] support multiple hosts in create_server/start_server

[Yann Sionneau]

Yann Sionneau added the comment:

About the missing capitalization, I omitted it because it's the argument's name. But I can resubmit with it being capitalized.
I forgot to run flake8, sorry!

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue23630>
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