* In the bigbluebutton_proxy::action_url call to submodules, we need a way to get
the instance this is called upon so we can have information (parameters) for
this instance settings (like the new settings introduced by subplugins).
* Add the optional instanceid parameter in join/create/getMeetingInfo calls
* get_join url should not have as many parameters as they can be deduced from the instance.
* Refactoring it will allow to pass on more implicit parameters like the user profile file.
* Provide a way for external participants to be invited to a meeting by giving them an url/password
for external users (not registered in Moodle)
* Add guest access page with username and password prompt
* Add form and modify API calls to take into account guest login
* Add a form modal to add guest users emails
* Allow copy of link and password in both popup form and module form
* The guest should be approved by default. It should be intentional to let them
in without checks.
* Guest access URL and password should not be copied when duplicating or backing
up the activity.
* The mod_bigbluebuttonbn_meeting_info web service function now
returns guestjoinurl and guestpassword only for moderators.
* Redirect if user already logged in
Note: this will allow guest to connect to an existing and running meeting. The moderator will then
be able to adjust the guest user's right. For security reasons we do not yet allow moderators
to join the meeting directly (or start a meeting)
* BBB has specific completion indicator that need to be taken into account
* Fix mock requests so we can send participant id and then attach events to them
* Refactor slightly the broker to split meeting logic from request (decoding)
* Fix update completion state cron
Display more friendly messages when:
* When displaying activity and the server is not available
* When we join a meeting and the server is not available or an error is detected
Laurent David