20120617 adapt to new script adm/whoconnect (FG)
20120609 Add : Alert message can be send to user connected by supervisor (FG)
20120406 Add : supervisor can see if participants are connected (FG)
2010-02 : Version 2.00
  This module replaces several previously existing language dependent modules adm/class/motd.xx
  of Gang Xiao. It has been constructed by localization of these modules, keeping a single 
  computation core and adding dictionaries.
  
 -----------------------  version 1.14
20090611 job=reactivate : permet au superviseur de ractiver un message cach par le participant.
20090611 job=hide permet au participant de cacher son message personnel
-----------------------  version 1.13
20090204 modifier le message du jour de plusieurs lves en mme temps.
20090204 beugfix : modification du message du jour aprs avoir modifi le message d'un lve.
-----------------------  version 1.12
20081125 ajout de la possibilit d'crire un message personnalis en fonction du participant (Fabrice Guerimand)
-----------------------  version 1.10