thread pools, each OpenMP master thread
     must call 'omp_set_num_threads'.
_Example_:
     Lets suppose we have three scheduler instances 'IO', 'WRK0', and
     'WRK1' with 'GOMP_RTEMS_THREAD_POOLS' set to '"1@WRK0:3$4@WRK1"'.
     Then there are no thread pool restrictions for scheduler instance
     'IO'.  In the scheduler instance 'WRK0' there is one thread pool
     available.  Since no priority is specified for this scheduler
     instance, the worker thread inherits the priority of the OpenMP
     master thread that created it.  In the scheduler instance 'WRK1'
     there are three thread pools available and their worker threads run
     at priority four.