Add cursor_id property to OpGetMore, and ssl parameter to interactive_server.
1.0.3
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``MockupDB(auto_ismaster=True)`` had just responded ``{"ok": 1}``, but this isn't enough to convince PyMongo 3 it's talking to a valid standalone, so auto-respond ``{"ok": 1, "ismaster": True}``.
1.0.2
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Restore Request.assert_matches method, used in pymongo-mockup-tests.