New protocol v3 : include pkdbf2 level

Remove hashtable from firefox addon
Rework firefox addon
Add pkdbf2_level as a preference (hidden)

server/_user

@@ -1,6 +1,6 @@
 <?php
 /*
-  Copyright (C) 2013 Grégory Soutadé
+  Copyright (C) 2013-2014 Grégory Soutadé
   
   This file is part of gPass.
   
@@ -18,6 +18,8 @@
   along with gPass.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+include("conf.php");
+
 function load_database()
 {
     try {
@@ -31,7 +33,7 @@ function load_database()
     return $db;
 }
 
-$PROTOCOL_VERSION = 2;
+$PROTOCOL_VERSION = 3;
 
 $db = load_database();
 
@@ -40,6 +42,8 @@ $res = "";
 $statement = $db->prepare("SELECT password FROM gpass WHERE login=:login");
 
 echo "protocol=gpass-$PROTOCOL_VERSION\n";
+if ($PKDBF2_LEVEL != 1000)
+    echo "pkdbf2_level=$PKDBF2_LEVEL\n";
 
 for ($i=0; isset($_POST["k$i"]); $i++)
 {