add Server HUD module

Shows the address of the server the player is on (mc.getCurrentServer),
or Singleplayer when hosting a local world.

src/main/java/cc/fros/features/modules/hud/ServerHudModule.java

@@ -0,0 +1,31 @@
+package cc.fros.features.modules.hud;
+
+import cc.fros.event.impl.render.Render2DEvent;
+import cc.fros.features.modules.client.HudModule;
+import cc.fros.util.render.FrosFont;
+import net.minecraft.client.multiplayer.ServerData;
+
+public class ServerHudModule extends HudModule {
+
+    public ServerHudModule() {
+        super("Server", "Display the server you are on", 150, 10);
+    }
+
+    @Override
+    protected void render(Render2DEvent e) {
+        super.render(e);
+
+        String serverStr;
+        if (mc.hasSingleplayerServer()) {
+            serverStr = "Server: Singleplayer";
+        } else {
+            ServerData data = mc.getCurrentServer();
+            serverStr = "Server: " + (data != null ? data.ip : "-");
+        }
+
+        FrosFont.draw(e.getContext(), serverStr, (int) getX(), (int) getY(), -1);
+
+        setWidth(FrosFont.width(serverStr));
+        setHeight(FrosFont.lineHeight());
+    }
+}

src/main/java/cc/fros/manager/ModuleManager.java

@@ -19,6 +19,7 @@ import cc.fros.features.modules.combat.CriticalsModule;
 import cc.fros.features.modules.combat.KeyPearlModule;
 import cc.fros.features.modules.hud.ArrayListHudModule;
 import cc.fros.features.modules.hud.ArmorHudModule;
+import cc.fros.features.modules.hud.ServerHudModule;
 import cc.fros.features.modules.hud.TpsHudModule;
 import cc.fros.features.modules.hud.CoordinatesHudModule;
 import cc.fros.features.modules.hud.FpsHudModule;
@@ -61,6 +62,7 @@ public class ModuleManager implements Jsonable, Util {
         register(new TimeHudModule());
         register(new ArmorHudModule());
         register(new TpsHudModule());
+        register(new ServerHudModule());
         register(new HudEditorModule());
         register(new ClickGuiModule());
         register(new NotificationsModule());