`undef` is falsy so there's no need to check whether the value is
defined.

  * Pass login and password via `login` and `password` options to
    avoid issues with escaping special characters.
  * Don't attempt twice -- if the first attempt fails, the second will
    almost certainly fail as well.  (The two attempted URLs were
    equivalent, differing only in how the login and password were
    passed.)

The `infomaniak` protocol doesn't use `server`.