SCHEMA CHANGES: Add tables for Hochwasserschutzanlagen This adds the first draft of Hochwasserschutzanlagen tables hws_points and hws_lines which replace the old hws table and also lookup tables fed_states and hws_kinds.

SYMBOLSET
SYMBOL
  NAME 'point'
  TYPE ELLIPSE
  POINTS
    1 1
  END
  FILLED TRUE
END
SYMBOL
  NAME "square"
  TYPE VECTOR
  POINTS
    0 0
    0 1
    1 1
    1 0
    0 0
  END
  FILLED TRUE
END
END