strip html comments


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@23145 35612d4c-9d10-0410-837c-bf9dd1be60d7
also drop CDATA


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@23146 35612d4c-9d10-0410-837c-bf9dd1be60d7
add comment


git-svn-id: https://forge.indepnet.net/svn/glpi/trunk@23147 35612d4c-9d10-0410-837c-bf9dd1be60d7