For typo3 ig_ldap_sso_auth, add the primary usergroup from gidnumber to memberOf ldapgroups

Authentication.diff

--- a/Classes/Library/Authentication.php 
+++ b/Classes/Library/Authentication.php 
@@ -456,6 +456,9 @@
                     !(bool)static::$config['GroupsNotSynchronize'],
                     $ldapInstance
                 );
+                $primaryGroup = $ldapInstance->search(static::$config['groups']['basedn'], '(&(gidnumber='.$ldapUser['gidnumber'][0].')(objectClass=posixGroup))', $ldapGroupAttributes);
+                $ldapGroups[] = $primaryGroup[0];
+                $ldapGroups['count']++;
             }
         } else {
             // Get LDAP groups from DN of user.