Updated configuration guide

Author: vyskocilpavel

README.md

@@ -16,12 +16,21 @@ Once you have installed SimpleSAMLphp, installing this module is very simple. Fi
 1. Install MySQL Database and create database for statistics and user. 
 2. For this database run script to create tables. Script is available in config-templates/tables.sql.
 3. Copy config-templates/module_statisticsproxy.php to your folder vith config and filled it.
-4. Add following to authproc in file saml20-idp-hosted.php:
-
-
-      XX => array(
-                                'class' => 'proxystatistics:statistics',
-                                'config' => array (),
-                        ),
-                    
-      #where XX is number(for example 50; Must not be used for other modules)
+4. Configure IdPAttribute filter from Perun module to get sourceIdPName from IdP metadata:  
+```
+    XX => array(
+            'class' => 'perun:IdPAttribute',
+            'attrMap' => array(
+                    'name:en' => 'sourceIdPName',
+            ),
+    ),
+    #where XX is priority(for example 30; Must not be used for other modules)
+```
+5 . Configure proxystatistic filter
+```
+    XX => array(
+            'class' => 'proxystatistics:statistics',
+            'config' => array (),
+    ),                
+    #where XX is priority(for example 50; Must not be used for other modules)
+```