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}.
      *