[0.83] security : seialize -> json (need to complete work, make common function to manage array posted in forms, test it)


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.83-bugfixes@21169 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.83] minor fix last


git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.83-bugfixes@21170 35612d4c-9d10-0410-837c-bf9dd1be60d7