Security-fixed usergroup and user handling - the interface actions for user groups were already protected but the back-office actions were unsafe. For now only super admin (userid=1) may create, update or edit user groups

git-svn-id: file:///Users/Shitiz/Downloads/lssvn/source/stable_plus@3491 b72ed6b6-b9f8-46b5-92b4-906544132732