SP_kill should be called when the application needs to close
a connection to the Spread daemon, but does not want to notify the
daemon about the close. The most common case of needing this is when a
Spread client application calls the unix function
fork() and needs to close the connection in either the parent or child since the other
will handle the communcation.
SP_disconnect() function should be used to disconnect from the daemon as it correctly and expediently notifies the daemon about the disconnection. If a client
SP_kill instead of SP_disconnect when no other process has the client side mbox open (because
of fork) then the network connection to the daemon will be closed and the daemon
will detect the client as disconnected as soon as the network layer (TCP) registers
a closed socket on the daemon side. Thus it will appear to the daemon as if a true
network fault occurred or the client crashed as opposed to cleanly disconnecting.
mbox should be for the connection you wish to close the mbox on.