Reject connections in a way driver's stations are happier about

Doing it this way allows tethering while FMS is running for robots which
aren't in the current match.

driver_station_connection.go

@@ -284,19 +284,20 @@ func ListenForDriverStations() {
 		teamId := int(packet[3])<<8 + int(packet[4])
 
 		// Check to see if the team is supposed to be on the field, and notify the DS accordingly.
+		assignedStation := mainArena.getAssignedAllianceStation(teamId)
+		if assignedStation == "" {
+			log.Printf("Rejecting connection from Team %d, who is not in the current match, soon.", teamId)
+			go func() {
+				// Wait a second and then close it so it doesn't chew up bandwidth constantly trying to reconnect.
+				time.Sleep(time.Second)
+				tcpConn.Close()
+			}()
+			continue
+		}
 		var assignmentPacket [5]byte
 		assignmentPacket[0] = 0  // Packet size
 		assignmentPacket[1] = 3  // Packet size
 		assignmentPacket[2] = 25 // Packet type
-		assignedStation := mainArena.getAssignedAllianceStation(teamId)
-		if assignedStation == "" {
-			log.Printf("Rejecting connection from Team %d, who is not in the current match.", teamId)
-			assignmentPacket[3] = 0
-			assignmentPacket[4] = 2
-			tcpConn.Write(assignmentPacket[:])
-			tcpConn.Close()
-			continue
-		}
 		log.Printf("Accepting connection from Team %d in station %s.", teamId, assignedStation)
 		assignmentPacket[3] = allianceStationPositionMap[assignedStation]
 		assignmentPacket[4] = 0