- a6df41aa ds/model: boost::optional -> std::optional
- 95aa93a9 ds/enum: allow tryToEnum to work also with std::optional
- f3d10b2b ds-model: remove dead include
- 1e4596e0 ds/model: ZoneApplicationsStatus is json array by id
- acc91d08 ds/json: add support struct as id array
- c078e3dd ds/str,json: add support for std::optional
- 8917d7e0 ds/str: serialize boost::none and null string as null