Added more info to config description
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="../Config.xsd">
<!--
- serverAddress - ip of the XMage server. Set it to "0.0.0.0" for local host or to the IP the server should use
+ Official guide to setup public server and NAT: https://www.slightlymagic.net/forum/viewtopic.php?f=70&t=15898
+
+ serverAddress - ip or domain of the XMage server. Set it to "0.0.0.0" for local host or to the IP the server should use
+ Public server should be accessable to all clients by it's name (example: xmage.mydomain.com)
port - the port the primary server socket is bound to
secondaryBindPort - the port to which the secondary server socket is to be bound. if "-1" is set , an arbitrary port is selected.
backlogSize - the preferred number of unaccepted incoming connections allowed at a given time. The actual number may be greater
