Add 'unsafe' api for things like packet sending that may be implementation specific or break at any time

api/pom.xml

@@ -37,6 +37,12 @@
             <version>${project.version}</version>
             <scope>compile</scope>
         </dependency>
+        <dependency>
+            <groupId>net.md-5</groupId>
+            <artifactId>bungeecord-protocol</artifactId>
+            <version>${project.version}</version>
+            <scope>compile</scope>
+        </dependency>
         <dependency>
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>

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

@@ -1,6 +1,7 @@
 package net.md_5.bungee.api.connection;
 
 import java.net.InetSocketAddress;
+import net.md_5.bungee.protocol.packet.DefinedPacket;
 
 /**
  * A proxy connection is defined as a connection directly connected to a socket.
@@ -15,7 +16,7 @@ public interface Connection
      *
      * @return the remote address
      */
-    public InetSocketAddress getAddress();
+    InetSocketAddress getAddress();
 
     /**
      * Disconnects this end of the connection for the specified reason. If this
@@ -25,5 +26,23 @@ public interface Connection
      * @param reason the reason shown to the player / sent to the server on
      * disconnect
      */
-    public void disconnect(String reason);
+    void disconnect(String reason);
+
+    /**
+     * Get the unsafe methods of this class.
+     *
+     * @return the unsafe method interface
+     */
+    Unsafe unsafe();
+
+    interface Unsafe
+    {
+
+        /**
+         * Send a packet to this connection.
+         *
+         * @param packet the packet to send
+         */
+        void sendPacket(DefinedPacket packet);
+    }
 }