proper srw command split in  dnet_ioclient

When starting cmd as following:
dnet_ioclient -r addr:port:family -g1:2:3... -c "application-name@event event-data lives here"

first space. i.e. one just after application-name@event is used as a delimiter
to split event name (first part) and event data (second part after the space)

Previously this first space was sent as a part of data,
but now we split string at this space and do not send it as part of data.
Previously data sent to client was: ' event-data lives here'
Now it is                           'event data lives here'