-Improve help texts of Wi-SUN configuration values
-Add min/max value checks to Wi-SUN configuration values
-Define default values for some parameters, instead of referring to
Nanostack internal default values.
Wi-SUN mesh API uses now nanostack certificate interface with length parameters.
This enables that either PEM or DER formatted certificates can be used. Using
the length configuration for certificates and keys is optional, so existing
applications using the PEM certificates do not require changes.
To get Wi-Sun mesh network working, also nanostack with Wi-Sun support
is needed. ws_empty_functions.c and ws_management_api.h are temporary
included here, so that wisun_tasklet will compiled without problems.
They will replaced with the official versions with next nanostack release.