Core: optimize string splitting

- Mainly affects item loading performance
  - Reduces guild loading time a lot

--HG--
branch : trunk

src/server/shared/Database/MySQLConnection.h

@@ -32,19 +32,18 @@ struct MySQLConnectionInfo
     MySQLConnectionInfo() {}
     MySQLConnectionInfo(const std::string& infoString)
     {
-        Tokens tokens = StrSplit(infoString, ";");
-        Tokens::iterator iter = tokens.begin();
+        Tokens tokens(infoString, ';');
 
-        if (iter != tokens.end())
-            host = *iter++;
-        if (iter != tokens.end())
-            port_or_socket = *iter++;
-        if (iter != tokens.end())
-            user = *iter++;
-        if (iter != tokens.end())
-            password = *iter++;
-        if (iter != tokens.end())
-            database = *iter++;
+        if (tokens.size() != 5)
+            return;
+
+        uint8 i = 0;
+
+        host.assign(tokens[i++]);
+        port_or_socket.assign(tokens[i++]);
+        user.assign(tokens[i++]);
+        password.assign(tokens[i++]);
+        database.assign(tokens[i++]);
     }
 
     std::string user;