libnmdc: support hub-redirects

src/libnmdc/libnmdc.go

@@ -315,15 +315,13 @@ func (this *HubConnection) processProtocolMessage(message string) {
 			this.State = CONNECTIONSTATE_CONNECTED
 		}
 
-	case "$UserCommand":
-		// $UserCommand 1 1 Group chat\New group chat$<%[mynick]> !groupchat_new&#124;|
-		// TODO
-
 	case "$ForceMove":
-		// TODO
+		this.Hco.Address = HubAddress(commandParts[1])
+		this.conn.Close() // we'll reconnect onto the new address
 
 	// IGNORABLE COMMANDS
 	case "$Supports":
+	case "$UserCommand": // TODO $UserCommand 1 1 Group chat\New group chat$<%[mynick]> !groupchat_new&#124;|
 	case "$UserList":
 	case "$OpList":
 	case "$HubTopic":