Updated MDB2 with MSSQL support + some cosmetics

program/include/main.inc

@@ -185,7 +185,7 @@ function rcmail_authenticate_session()
   // renew auth cookie every 5 minutes (only for GET requests)
   if (!$valid || ($_SERVER['REQUEST_METHOD']!='POST' && $now-$_SESSION['auth_time'] > 300))
     {
-	  $_SESSION['last_auth'] = $_SESSION['auth_time'];
+    $_SESSION['last_auth'] = $_SESSION['auth_time'];
     $_SESSION['auth_time'] = $now;
     setcookie('sessauth', rcmail_auth_hash(session_id(), $now));
     }

program/include/rcube_mdb2.inc

@@ -410,6 +410,25 @@ class rcube_db
     }
 
 
+  /**
+   * Return SQL function for current time and date
+   *
+   * @return string SQL function to use in query
+   * @access public
+   */
+  function now()
+    {
+    switch($this->db_provider)
+      {
+      case 'mssql':
+        return "getdate()";
+
+      default:
+        return "now()";
+      }
+    }
+
+
   /**
    * Return SQL statement to convert a field value into a unix timestamp
    *
@@ -425,6 +444,9 @@ class rcube_db
         return "EXTRACT (EPOCH FROM $field)";
         break;
 
+      case 'mssql':
+        return "datediff(s, '1970-01-01 00:00:00', $field)";
+
       default:
         return "UNIX_TIMESTAMP($field)";
       }

program/js/app.js

@@ -49,7 +49,7 @@ function rcube_webmail()
                              'application/x-shockwave-flash');
 
   // default environment vars
-  this.env.keep_alive = 50;        // seconds
+  this.env.keep_alive = 60;        // seconds
   this.env.request_timeout = 180;  // seconds
   this.env.draft_autosave = 0;     // seconds