Add PlayerHandshakeEvent which allows changing of versions and online mode status amongst other things.

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

@@ -0,0 +1,34 @@
+package net.md_5.bungee.api.event;
+
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+import lombok.ToString;
+import net.md_5.bungee.api.connection.PendingConnection;
+import net.md_5.bungee.protocol.packet.Packet2Handshake;
+import net.md_5.bungee.api.plugin.Event;
+
+/**
+ * Event called to represent a player first making their presence and username
+ * known.
+ */
+@Data
+@ToString(callSuper = false)
+@EqualsAndHashCode(callSuper = false)
+public class PlayerHandshakeEvent extends Event
+{
+
+    /**
+     * Connection attempting to login.
+     */
+    private final PendingConnection connection;
+    /**
+     * The handshake.
+     */
+    private final Packet2Handshake handshake;
+
+    public PlayerHandshakeEvent(PendingConnection connection, Packet2Handshake handshake)
+    {
+        this.connection = connection;
+        this.handshake = handshake;
+    }
+}