void setInterfaces(Set<InetAddress> interfaces) {
    this.interfaces = interfaces;
    if (interfaces == null || interfaces.size() == 0) {
      throw new SystemConnectException("Unable to examine network card");
    }
  }
Sets the tcpDisabled flag for this message

@since GemFire 5.0
geode-core/src/main/java/org/apache/geode/distributed/internal/StartupMessage.java