[0.85] fix search for software - fixed #4283

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20651 35612d4c-9d10-0410-837c-bf9dd1be60d7
[0.85] add validity date for user - see #4227

git-svn-id: https://forge.indepnet.net/svn/glpi/branches/0.85-work@20652 35612d4c-9d10-0410-837c-bf9dd1be60d7