+30May20=======================================================================
+1. Fix sh/dx! It appears that there is a long standing problem with sh/dx not
+ actually return all the answers it should. I have also had a request to
+ allow / enable the "not" keyword (just like the filtering system dones).
+
+ Now this was one of the earliest modules that I wrote and it took quite
+ a bit of work to tease out the important bits and then use the Filter
+ module (as in acc/spot) to generate the sh/dx filtering expressions. This
+ seems to have been done.
+
+ NB This will likely not work if you are using a SQL backend to do sh/dx
+ commands. This was never actually an official feature. It is now
+ deprecated.
+29May20=======================================================================
+1. Please install Math::Round and Data::Structure::Util. Instructions are
+ available in UPGRADE.mojo.
+2. Notwithstanding item 1 below. I have decided to keep DB_File but ditch
+ Storable. The current users.v3 will be converted, automatically, to
+ users.v3j on startup. After this is done a 'user_json' file (the
+ replacement for 'user_asc') will also be generated.
20May20=======================================================================
1. Backport convert-users-v3-to-v4.pl to allow creation of the new json
formatted *text* based user file from the old v3 DB_File and Storable