Add ServerPlayer#connectionState

Shortcut instead of having to go thru the polymorphic EngineConnection#state.

Author: aromaa

src/main/java/org/spongepowered/api/entity/living/player/server/ServerPlayer.java

@@ -47,6 +47,7 @@
 import org.spongepowered.api.event.Cause;
 import org.spongepowered.api.item.inventory.Container;
 import org.spongepowered.api.item.inventory.Inventory;
+import org.spongepowered.api.network.ServerConnectionState;
 import org.spongepowered.api.network.ServerSideConnection;
 import org.spongepowered.api.scoreboard.Scoreboard;
 import org.spongepowered.api.service.permission.Subject;
@@ -185,6 +186,14 @@ default SetValue.Mutable<SkinPart> displayedSkinParts() {
  */
  ServerSideConnection connection();
 
+ /**
+ * Gets the appropriate {@link ServerConnectionState.Game} linking this player to a
+ * connection state.
+ *
+ * @return The connection state
+ */
+ ServerConnectionState.Game connectionState();
+
  /**
  * Gets this player's {@link TabList}.
  *