* Support for dead arguments has been removed.
** Especially, dead UCB_CONFIGURATION_KEY1/2_xxx values have also been removed,
   and code initializing UCB has been simplified accordingly.
* For the sake of simplicity, behaviour has been changed slightly.  For example,
  passing both --calc --writer now always lets --writer win (whereas in the past
  the one mentioned first, i.e., --calc in this example, would win).

Change-Id: Id40a19b9ef96db0d439cadd96ba491bf640d28fb