Added async PreLoginEvent to change online mode per connection.

api/src/main/java/net/md_5/bungee/api/connection/PendingConnection.java

@@ -43,4 +43,18 @@ public interface PendingConnection extends Connection
      * @return the UUID
      */
     String getUUID();
+    
+    /**
+     * Get this connection's online mode.
+     *
+     * @return the online mode
+     */
+    boolean isOnlineMode();
+    
+    /**
+     * Set this connection's online mode.
+     * 
+     * @param onlineMode 
+     */
+    void setOnlineMode(boolean onlineMode);
 }

api/src/main/java/net/md_5/bungee/api/event/PreLoginEvent.java

@@ -0,0 +1,37 @@
+package net.md_5.bungee.api.event;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import net.md_5.bungee.api.Callback;
+import net.md_5.bungee.api.connection.PendingConnection;
+import net.md_5.bungee.api.plugin.Cancellable;
+
+/**
+ * Event called to represent a player first making their presence and username
+ * known.
+ */
+@Data
+@ToString(callSuper = false)
+@EqualsAndHashCode(callSuper = false)
+public class PreLoginEvent extends AsyncEvent<PreLoginEvent> implements Cancellable {
+
+    /**
+     * Cancelled state.
+     */
+    private boolean cancelled;
+    /**
+     * Message to use when kicking if this event is canceled.
+     */
+    private String cancelReason;
+    /**
+     * Connection attempting to login.
+     */
+    private final PendingConnection connection;
+
+    public PreLoginEvent(PendingConnection connection, Callback<PreLoginEvent> done)
+    {
+        super( done );
+        this.connection = connection;
+    }
+}