SILC Dynamic List API can be used to add opaque contexts to list that
 will automatically allocate list entries.  Normal SILC List API cannot
 be used for this purpose because in that case the context passed to the
 list must be defined as list structure already.  This is not the case in
 SilcDList.

 This is slower than SilcList because this requires one extra memory
 allocation when adding new entries to the list.  The context is probably
 allocated already and the new list entry requires one additional memory
 allocation.  The memory allocation and freeing is done automatically in
 the API and does not show to the caller.