Do some cleaning up.
Don't force QT_WORKER_UNIT=core with the nemesi...
Assert (implicitly) that chpl_taskID_t is a 64-...
Add tests for the -f execution-time options.
Moved a misplaced break.
Re-alphabetize argument processing.
Control stack checking with a specific compiler...
Enable querying compile-time --[no-]checks sett...