[det]tipc_setopt(+Socket, 
+Option)Sets options on the socket. Defined options are:
- importance(+Priority)
- Allow sockets to assign a priority to their traffic. Priority is one of 
: low(default),medium,high, orcritical.
- src_droppable(+Boolean)
- Allow TIPC to silently discard packets in congested situations, rather 
than queuing them for later transmission.
- dest_droppable(+Boolean)
- Allow TIPC to silently discard packets in congested situations, rather 
than returning them to the sender as undeliverable.
- conn_timeout(+Seconds)
- Specifies the time interval that tipc_connect/2 
will use before abandoning a connection attempt. Default: 8.000 sec.