This can be used by the host to force-disconnect the spectator(s). After sending the network msg, this calls the same code used by NWMUDS:UpdateNetworkAttribute internally, with bitmask=0x1 and flag=1. New spectator connections will not be accepted any more after using this command, until that attribute bit is cleared.

This sends a broadcast data packet to channel 0x104 with a single 0 byte as data.