Added possibility to run server on any port

[Akilan1999]

Problem

In the previous implementation the server was required on run on port 8088.

Solution

The server can run on any port and still be a part of the network. This is done
by adding a new field in the iptable file.

 {
   "ipv4": "<ip address>",
   "ipv6": "",
   "latency": 0,
   "download": 0,
   "upload": 0,
   // New field 
   "serverport": "<new field>"
  }