Change clientpackets to std::deque from LinkedList

This should be better performance, but I couldn't really
push local testing to hit the performance issues ...

zone/client.h

@@ -70,6 +70,7 @@ namespace EQEmu
 #include <set>
 #include <algorithm>
 #include <memory>
+#include <deque>
 
 
 #define CLIENT_TIMEOUT 90000
@@ -1424,7 +1425,7 @@ private:
 	bool AddPacket(const EQApplicationPacket *, bool);
 	bool AddPacket(EQApplicationPacket**, bool);
 	bool SendAllPackets();
-	LinkedList<CLIENTPACKET *> clientpackets;
+	std::deque<std::unique_ptr<CLIENTPACKET>> clientpackets;
 
 	//Zoning related stuff
 	void SendZoneCancel(ZoneChange_Struct *zc);