[issue23630] support multiple hosts in create_server/start_server

[Yury Selivanov]

Yury Selivanov added the comment:

> - accept host and port arguments being sequences and then we bind to all host:port combinations. Like if len(host) == N and len(port) == M, we bind to N*M sockets.

I can't think of a real life example for this.  But if you need that, you can always implement that on top of function that accepts multiple (host,port) pairs.

> - accept host and port arguments being sequences and allow repetitions and bind to host:port couples from zip(host, port).

I'm not sure I like this either.  This breaks one value `(h,p)` into two values, and passes them in separate collections to separated arguments.  Too complex.

My proposal is to allow the following:

   create_server(protofac, [(h1,p1),(h2,p2)])

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<http://bugs.python.org/issue23630>
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