sdxo#4541: Now, Moodle has 100% transparent-authentication.

"Moodle" has the scope of benefitting from the objective of sdxo#4248, as detailed by the following workflow ::


Observed behaviour
==============

    *
    An XO is freshly flashed with a image.

    *
    Now. launch the "Browse" activity, and go to "http://schoolserver/moodle".

    *
    Since the XO is not registered with any school-server (yet), we see a login-page. However, it is not clear at all 
    as to what username/password the user must enter. The big news, however, is that the user is not intended to 
    remember any username/password (for Moodle login) anyway.


Correct behaviour
=============

    In the last step of the above, the user must be shown a simple message, asking the user to register first. 
    After the user registers and re-visits the URL, he is automatically logged-in transparently into Moodle.


Thus, the main motive of this ticket, is to never show the (meaningless) login-page in Moodle.