===  ALL USERS PLEASE NOTE  ========================

The garbage collector now works.  In addition a new, experimental garbage 
collection algorithm has been installed.  With SI:%DSK-GC-QLX-BITS set to 17,
(NOT the default) the old garbage collection algorithm remains in force; when 
virtual storage is filled, the machine cold boots itself.  With SI:%DSK-GC-
QLX-BITS set to 23, the new garbage collector is enabled.  Unlike most garbage
collectors, the new gc starts its mark phase from the mind of the user, rather 
than from the obarray.  This allows the garbage collection of significantly 
more Qs.  As the garbage collector runs, it may ask you something like "Do you
remember what SI:RDTBL-TRANS does?", and if you cant give a reasonable answer
in thirty seconds, the symbol becomes a candidate for GCing.  The variable 
SI:%GC-QLX-LUSER-TM governs how long the GC waits before timing out the user.