Vsh is designed for version seven Unix.  It should work on version
six proveded special versions of gtty, stty and getenv are provided.

The builtin parameters in cmdini.c must be correct before compiling.
First, the "argv" variables must reference the proper programs
and files.  Then the parmtab must be modified to reference
other appropriate programs and files.

When finished, execute make to create the vsh program.
Then type "make cp".