oc-mail: Support restricitions on name for MAPIStoreMailFolderTable

This allows us to search for a subfolder in a mail
folder successfully. This is happening, for instance, on folder creation.

OpenChange/MAPIStoreMailFolderTable.m

@@ -0,0 +1,42 @@
+/* MAPIStoreMailFolderTable.m - this file is part of SOGo
+ *
+ * Copyright (C) 2015 Enrique J. Hernández
+ *
+ * This file is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * This file is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; see the file COPYING.  If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#import <Foundation/NSString.h>
+
+#import "MAPIStoreMailFolderTable.h"
+#import "MAPIStoreTypes.h"
+
+@implementation MAPIStoreMailFolderTable
+
+- (NSString *) backendIdentifierForProperty: (enum MAPITAGS) property
+{
+  switch(property)
+    {
+    case PR_DISPLAY_NAME:
+    case PR_DISPLAY_NAME_UNICODE:
+      return @"name";
+    default:
+      return nil;
+    }
+}
+
+
+@end
+