They were useless because native method Array.prototype.indexOf,
Math.min and Math.max do the same thing.

If you put {
  "_id": "a.b",
  "_attachment": "compressed.tar.gz",
  "_data": ...
}, the backend will write "a_.b.compressed.tar.gz"
instead of "a_.b.compressed_.tar_.gz"

In this example, status was not considered at all:

    command.success({"status": 201});

was returning 201 or 200 instead of 204 or 201

In this example, reason was not considered at all:

    command.reject(409, {"reason": "problem"});

To avoid phantomjs (or headless webkit) bug.