remove $global_assign property from Smarty and $global_assign-handling

from the constructor. the only visible change is, that $SCRIPT_NAME is
not available in the tempates anymore. $smarty.server.SCRIPT_NAME has
to be used from now.

NEWS

@@ -1,3 +1,5 @@
+  - remove {$SCRIPT_NAME}. use {$smarty.server.SCRIPT_NAME} instead (messju)
+  - remove $global_assign. assign global variables explicitly instead (messju)
   - remove warning in debug_print_var on php-resources (messju)
   - move function.assign.php to compiler.assign.php (messju)
   - add property $tpl_error_reporting (messju)

libs/Smarty.class.php

@@ -339,16 +339,6 @@ class Smarty
      */
     var $cache_handler_func   = null;
 
-    /**
-     * These are the variables from the globals array that are
-     * assigned to all templates automatically. This isn't really
-     * necessary any more, you can use the $smarty var to access them
-     * directly.
-     *
-     * @var array
-     */
-    var $global_assign   =  array('HTTP_SERVER_VARS' => array('SCRIPT_NAME'));
-
     /**
      * This indicates which filters are automatically loaded into Smarty.
      *
@@ -590,32 +580,11 @@ class Smarty
     /**#@-*/
     /**
      * The class constructor.
-     *
-     * @uses $global_assign uses {@link assign()} to assign each corresponding
-     *                      value from $GLOBALS to the template vars
      */
     function Smarty()
     {
-        foreach ($this->global_assign as $key => $var_name) {
-            if (is_array($var_name)) {
-                foreach ($var_name as $var) {
-                    if (isset($GLOBALS[$key][$var])) {
-                        $this->assign($var, $GLOBALS[$key][$var]);
-                    } else {
-                        $this->assign($var, null);
-                    }
-                }
-            } else {
-                if (isset($GLOBALS[$var_name])) {
-                    $this->assign($var_name, $GLOBALS[$var_name]);
-                } else {
-                    $this->assign($var_name, null);
-                }
-            }
-        }
     }
 
-
     /**
      * assigns values to template variables
      *