Some news: by modifying the .htaccess so that the RewriteRule redirects,
RewriteRule ^(.*)$ %1/http.php/$1
=> I do not have the "File Not Found" problem.
I also had to modify the rcron.php so that curl takes the redirection into account:
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE);
But now I end up with a "URL not supported" answer when I run rcron.php:
#!/usr/bin/php -qHTTP/1.1 302 FoundDate: Wed, 19 Feb 2014 08 GMTServer: ApacheLocation: http://dev.mallbox.fr/support/api/http.php/tasks/cronVary: Accept-EncodingContent-Length: 237Content-Type: text/html; charset=iso-8859-1HTTP/1.1 400 Bad RequestDate: Wed, 19 Feb 2014 08 GMTServer: ApacheX-Powered-By: PHP/5.5.7Connection: CloseContent-Length: 17Vary: Accept-EncodingContent-Type: text/html; charset=UTF-8URL not supported
I don't know how to fix that...
I could also see that I get the same answer if I directly open http://dev.mallbox.fr/support/api/http.php/tasks/cron