SHOWCUSERS, SYSTEM_MGMT, Cluster-wide Graphical SHOW USERS

Provides graphical display of users accross the cluster.  Original author
is unknown, but I have made a few modifications.

     Jonathan C. Baker
     Naval Surface Warfare Center
     Code N861
     Dahlgren, VA 22448
     703-663-8705              jbaker@relay.nswc.navy.mil