VSNCTL MAINTAIN

  Setup maintenance environment.
  Takes the generations associated with a released class, cre-
  ates variant generations of them, and inserts the new variant
  generations into a maintenance class. Only valid when used
  from a maintenance environment.

  If the maintenance environment has its own CMS library, it
  is recreated from the maintenance class in the common CMS
  library.

  Optionally, the new maintenance environment may be built
  from source.