[0.85] more security check see #4480


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21750 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] add warning see #4480


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@21752 35612d4c-9d10-0410-837c-bf9dd1be60d7