Experimental DB pool + fixed stat overflow on equips

Implemented EXPERIMENTAL DBCP (connection pool), trying to improve
concorrent access to DB. Added door portals on Kerning Square. Fixed
equipments getting stat overflow when upgrading stats. Fixed expiring
pets crashing the client in some cases.

src/scripting/portal/PortalPlayerInteraction.java

@@ -22,6 +22,7 @@
 package scripting.portal;
 
 import client.MapleClient;
+import java.sql.Connection;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -46,14 +47,16 @@ public class PortalPlayerInteraction extends AbstractPlayerInteraction {
     public boolean hasLevel30Character() {
         PreparedStatement ps = null;
         ResultSet rs = null;
+        Connection con = null;
         try {
-            ps = DatabaseConnection.getConnection().prepareStatement("SELECT `level` FROM `characters` WHERE accountid = ?");
+            con = DatabaseConnection.getConnection();
+            ps = con.prepareStatement("SELECT `level` FROM `characters` WHERE accountid = ?");
             ps.setInt(1, getPlayer().getAccountID());
             rs = ps.executeQuery();
             while (rs.next()) {
                 if (rs.getInt("level") >= 30) {
-                	ps.close();	
-                	rs.close();
+                    ps.close();
+                    rs.close();
                     return true;
                 }
             }
@@ -67,11 +70,15 @@ public class PortalPlayerInteraction extends AbstractPlayerInteraction {
                 if (rs != null && !rs.isClosed()) {
                     rs.close();
                 }
+                if (con != null && !con.isClosed()) {
+                    con.close();
+                }
             } catch (SQLException ex) {
                 ex.printStackTrace();
             }
         }
-        return false;
+        
+        return getPlayer().getLevel() >= 30;
     }
 
     public void blockPortal() {