Redirect it's only done by the html method but must be done too with http method.
Creation of two functions redirect_http and redirect_html.
Function redirect calls one or other functions follow $conf or parameters.
$conf value are true on BSF, in order to check modifications.
Must be set to false on RC.
git-svn-id: http://piwigo.org/svn/trunk@1649 68402e56-0260-453c-a942-63ccdbb3a9ee