[c-c list] add an optional argument to the list command (closes #2709703) This optional argument allows to restrict listing to only a given type of items (cubes, instances, configurations).

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−if versions_map['cubicweb'][0] == (3, 7, 4):
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−    config['http-session-time'] *= 60
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−    config['cleanup-session-time'] *= 60
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−    config['cleanup-anonymous-session-time'] *= 60