added: now we have a fourth part in permissions (guests)

e.g.: 07555 means:
           7 for owner
           5 for group
           5 for others
           5 for guests (not logged users)
added:     the sticky bit for directories
           e.g. permissions to a directory with a sticky bit set
           can be set to: 017555
rewritten: rm/mv winix functions to correctly understand the sticky bit
added:     Dir::FollowLink() recognizes ".." and "." now
           consequently System::FollowAllLinks recognizes it too
added:     umask -- calculating privileges for new files/directories
           all users have their own umask (in meta)
           and there is one in the config
           (for guests and when a user has not definied its own one)
removed:   mount option: only_root_remove



git-svn-id: svn://ttmath.org/publicrep/winix/trunk@801 e52654a7-88a9-db11-a3e9-0013d4bc506e

plugins/thread/createthread.cpp

@@ -2,7 +2,7 @@
  * This file is a part of Winix
  * and is not publicly distributed
  * 
- * Copyright (c) 2008-2010, Tomasz Sowa
+ * Copyright (c) 2008-2012, Tomasz Sowa
  * All rights reserved.
  * 
  */
@@ -72,7 +72,7 @@ void CreateThread::MakePost()
 	functions->SetUser(cur->request->item);
 	functions->PrepareUrl(cur->request->item);
 	cur->request->item.parent_id  = cur->request->dir_tab.back()->id;
-	cur->request->item.privileges = 0644; // !! tymczasowo
+	cur->request->item.privileges = system->NewFilePrivileges();
 
 	if( functions->CheckAbuse() )
 		return;

plugins/thread/reply.cpp

@@ -2,7 +2,7 @@
  * This file is a part of Winix
  * and is not publicly distributed
  * 
- * Copyright (c) 2010, Tomasz Sowa
+ * Copyright (c) 2010-2012, Tomasz Sowa
  * All rights reserved.
  * 
  */
@@ -92,7 +92,7 @@ void Reply::MakePost()
 	functions->SetUser(answer);
 	functions->PrepareUrl(answer);
 	answer.parent_id  = files_dir->id;
-	answer.privileges = 0644; // !! tymczasowo
+	answer.privileges = system->NewFilePrivileges();
 
 	if( functions->CheckAbuse() )
 		return;