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

functions/ln.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.
  * 
  */
@@ -37,7 +37,7 @@ void Ln::CreateSymbolicLink(const std::wstring & link_to)
 	item.url           = cur->request->PostVar(L"url");
 	item.link_to       = link_to;
 	item.link_redirect = cur->request->IsPostVar(L"makeredirect") ? 1 : 0;
-	item.privileges    = 0644; // !! tymczasowo, bedzie uzyte umask
+	item.privileges    = system->NewFilePrivileges();
 	functions->SetUser(item);
 	functions->PrepareUrl(item);
 
@@ -64,7 +64,7 @@ void Ln::CreateHardLink(const std::wstring & link_to)
 		item.type          = Item::file;
 		item.parent_id     = cur->request->dir_tab.back()->id;
 		item.url           = cur->request->PostVar(L"url");
-		item.privileges    = 0644; // !! tymczasowo, bedzie uzyte umask
+		item.privileges    = system->NewFilePrivileges();
 		functions->SetUser(item);
 		functions->PrepareUrl(item);
 		cur->request->status = db->AddHardLink(item);