Added server local IP to plugin information

Remember to add your server IP to your Admin panel on mrdomain.com or
dondominio.com before using the API. Read the docs for more
information: https://dev.mrdomain.com

dondominio.php

@@ -104,7 +104,7 @@ function dondominio_getConfigArray()
 
 		"Description" => array(
 			"Type" => "System",
-			"Value" => "Register domains with DonDominio! Signup at <a href='https://www.dondominio.com/register/'>https://www.dondominio.com/register/</a>"
+			"Value" => "Register domains with DonDominio! Signup at <a href='https://www.dondominio.com/register/'>https://www.dondominio.com/register/</a><br /><br /><strong>Your local server IP address is " . file_get_contents( 'http://ipv4.icanhazip.com' ) . "</strong>"
 		),
 
 		//API login details