AliGenMUONCocktailpp is used with modified values of the

AliGenMUONCocktailpp is used with modified values of the
different cross-sections, hidden (as much as possible) from the people
who will analyze afterwards the results, in order to see the accuracy
of the physics analysis when unknown cross sections are at the input of
the Monte-Carlo. By default the hardwired values are used, and only if
intentionally some env variables are defined the values will be
changed, without print-out in the log file (as default).
(Bogdan Vulpescu)