File psl-1983/help/trace.hlp artifact 62eecd97c1 part of check-in 58a25bf8df

There are two  possible trace packages  to use in  PSL.  The  built-in
functions  are   described  as   the  Mini-Trace   package  (do   Help
MiniTrace;).  Those in the more powerful Debug package are  described
separately (do Help Debug;).