Wi-Fi Router X5 N600

Changed:

1. Show the guest network client on web and app agent
2. Add timeout to check DNS alive
3. Add procedure to verify ipv4 and ipv6 on ppp session

Fixed:

1. Ignore DHCP-PD check when use IPv6 Static/6RD type of connection
2. Fix IPv4 PPTP/L2TP hostname set/get error on app agent
3. Fixed Apple iOS 9 login issue with the MyWiFi app.
4. Fixes stability issue where the internet connection is lost and the router has to be rebooted in order to bring it back.