Rename and clean up MapleClient

src/main/java/net/server/channel/handlers/DoorHandler.java

@@ -22,7 +22,7 @@
 package net.server.channel.handlers;
 
 import client.Character;
-import client.MapleClient;
+import client.Client;
 import net.AbstractPacketHandler;
 import net.packet.InPacket;
 import server.maps.MapleDoorObject;
@@ -35,7 +35,7 @@ import tools.PacketCreator;
  */
 public final class DoorHandler extends AbstractPacketHandler {
     @Override
-    public final void handlePacket(InPacket p, MapleClient c) {
+    public final void handlePacket(InPacket p, Client c) {
         int ownerid = p.readInt();
         p.readByte(); // specifies if backwarp or not, 1 town to target, 0 target to town