Deallocates the record stream and clears the context value used
    with $FIND_HELD, $FIND_HOLDER, or $IDTOASC.
    On Alpha and Integrity server systems, this service accepts 64-
    bit addresses.
    Format
      SYS$FINISH_RDB  contxt
    C Prototype
      int sys$finish_rdb  (unsigned int *contxt);
1 – Argument
 contxt
    OpenVMS usage:context
    type:         longword (unsigned)
    access:       modify
    mechanism:    by 32- or 64-bit reference
    Context value to be cleared when $FINISH_RDB completes execution.
    The contxt argument is a longword containing the address of the
    context value.