unreliable-chat-client: setting BURST-LEN through client now works (#78)

when trying to chance BURST-LEN within a client in the old code would not do anything, because the server does nothing in this case. I assume it was assumed that leaving case "BURST-LEN" empty would cause to do the same as DELAY-LEN but it does not. Now it does.

VU-net ID: lvo233

unreliable_chat_check/BrokenChatServerLocal.go

@@ -422,6 +422,7 @@ func handleSetSelect(message string, addr net.Addr, output BrokenMessageOutputSt
 	split := strings.Split(message, " ")
 	switch split[1] {
 	case "BURST-LEN":
+		handleSetRange(message, addr, output)
 	case "DELAY-LEN":
 		handleSetRange(message, addr, output)
 	default: