Не работает merge_slashes off при редиректах

[SaveFrom.net]

Здравствуйте,

Запрос    http://sfrom.net/http://bar

Ответ      http://savefrom.net/http:/bar

Ожидали http://savefrom.net/http://bar
(пропал слеш в uri)

Конфиг
server {
 listen xxx;
server_name sfrom.net www.sfrom.net;
merge_slashes off;
rewrite '^\/https?:' 'http://savefrom.net$uri?foo' permanent;
rewrite ^ 'http://savefrom.net/http:/$uri?foo' permanent;
}


Linux  2.6.18-238.1.1.1.el5

nginx: nginx version: nginx/1.1.2
nginx: built by gcc 4.1.2 20080704 (Red Hat 4.1.2-50)
nginx: TLS SNI support disabled
nginx: configure arguments: --conf-path=/etc/nginx/nginx.conf
--sbin-path=/usr/sbin/nginx --error-log-path=/var/log/nginx/error.log
--http-log-path=/var/log/nginx/access.log
--http-client-body-temp-path=/var/spool/nginx/tmp/client
--http-proxy-temp-path=/var/spool/nginx/tmp/proxy
--http-fastcgi-temp-path=/var/spool/nginx/tmp/fastcgi
--pid-path=/var/run/nginx.pid --user=nginx --group=nginx
--with-http_ssl_module --with-http_gzip_static_module
--with-http_stub_status_module

-- 
С уважением, Антон
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