Template authors now can use tpl_sidebar() to include the sidebar.
Sidebars can be defined in subnamespaces as well

\w could match multibyte chars depending on system setup

crypt seems to behave different on different systems when the salt
is empty.

This allows to treat empty parameters as default

This new wrapper ensures types are correct and accessed parameters are
actually set (with custom default fallbacks).

The wrapper is available in the global $INPUT variable. It accesses
$_REQUEST by default. If POST or GET is required, the post and get
members can be used:

$INPUT->int('foo',false); // access $_REQUEST['foo'], default false
$INPUT->post->int('foo'); // access $_POST['foo'], default 0
$INPUT->get->int('foo'); // access $_GET['foo'], default 0

The codebase still needs to be updated to make use of this.

Fix for FS#2522 / Now all places of $lang['restored'] are covered with the restored-date information

This also fixes a problem wiht PHP 5.4 when there is metadata but the
date key is empty.