Add the global hostName string (reference to iotsaConfig.hostName) and a WITH_IOTSA_CONFIG_STRUCT to enable backward compatibitly for the one user of the mode variables (NeoClock).
Add the global hostName string (reference to iotsaConfig.hostName) and a WITH_IOTSA_CONFIG_STRUCT to enable backward compatibitly for the one user of the mode variables (NeoClock).

cwi-dis/iotsa,cwi-dis/iotsa,cwi-dis/iotsa,cwi-dis/iotsa