Use int for ports instead of short to support full port-range

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/config/WebserverConfig.java

@@ -19,7 +19,7 @@ public class WebserverConfig {
 
     private String ip = "0.0.0.0";
 
-    private short port = 8100;
+    private int port = 8100;
 
     private int maxConnectionCount = 100;
 
@@ -45,7 +45,7 @@ public class WebserverConfig {
         }
     }
 
-    public short getPort() {
+    public int getPort() {
         return port;
     }