Added explicit DEFGENERIC form for FLIP-SCREEN-CURSOR.
Added explicit DEFGENERIC form for DISPLAY-CURSOR.
Added explicit DEFGENERIC form for STREAM-SET-CURSOR-POSITION.
Added explicit DEFGENERIC form for SCROLL-VERTICAL.
Added explicit DEFGENERIC form for SCROLL-HORIZONTAL.
Added explicit DEFGENERIC form for STREAM-WRAP-LINE.